Science and Technology Vol.73 (nickel, cobalt, lithium, etc.)


https://twitter.com/NickelInstitute/status/1397465281224642560


https://twitter.com/twitandrewking/status/1197183415034040328
https://twitter.com/Andrestrujado/status/1397877871494959107
https://twitter.com/IntEngineering/status/1347921067638214657


https://twitter.com/IntEngineering/status/1289168934437031936


https://twitter.com/IntEngineering/status/1268724219791020033


https://twitter.com/IntEngineering/status/1415083622755758083


https://twitter.com/WIRED/status/1408045199088046083


https://twitter.com/WIRED/status/1229585496508190722


https://twitter.com/b_orzy/status/1334682846544465920


https://twitter.com/ShefUniNews/status/1412407773585887237


https://twitter.com/cheddar/status/1381710838487203840


Science and Technology Vol.72 (cobalt, etc.)


https://twitter.com/ORNLCleanEnergy/status/1225547215290191872
https://twitter.com/EnergyUT/status/1283427004239548424


https://twitter.com/energigune_brta/status/1276078176268095488


https://twitter.com/kiteandkeymedia/status/1410017989529853955

https://twitter.com/UNCTAD/status/1117782638121635840


https://twitter.com/JackPosobiec/status/1410717662225780745


https://twitter.com/Cambridge_Eng/status/1399640610584268800


https://twitter.com/NASA/status/1410270726729388039


Science and Technology Vol.71 / World Vol.154 (The Role of Critical Minerals in Clean Energy Transitions @IEA)

This is a very useful open-access report. I appreciate @IEA’s contribution to all the human beings.
(It is the first time to paste as many as 20 screenshots on this website. Hope this is helpful.)





















Austria Vol.7 (cities)



https://twitter.com/alpenadriauni/status/1410508488439177219


https://twitter.com/alpenadriauni/status/1408320753636945920


https://twitter.com/cfaed_TUD/status/1298392570645680128
https://twitter.com/lakesidescitec/status/1407638930598633473


https://www.youtube.com/watch?v=9DQ40SVfUwY
https://twitter.com/StadtVillach/status/1354794170943229963
https://twitter.com/JosepEudald/status/1411809097725403140


https://twitter.com/chris4024/status/1411033963074883587


https://twitter.com/phoenixbookcafe/status/1410615644169461769
https://twitter.com/WagnerGerfried/status/1411053281900642306




https://twitter.com/StadtDornbirn/status/1400716490605748224


https://twitter.com/transitdiagrams/status/1369344732376272898



https://twitter.com/EUHomeAffairs/status/1410180885702393858

https://www.youtube.com/watch?v=UPaQga3Y08g


https://twitter.com/breakonthru234/status/1399470153528594432





https://twitter.com/PhilWe1/status/1409092411842863107




https://twitter.com/CarfreeNetwork/status/1411253894831874049


https://twitter.com/LadySileL/status/1409832616572985344


https://twitter.com/viennasymphony/status/1410519824556507137
https://twitter.com/der_heubi/status/1408785219373703171


Ireland Vol.73

https://twitter.com/ucddublin/status/1409874778077413385
https://twitter.com/ucddublin/status/1409822210001293312
https://twitter.com/ucddublin/status/1407643455451545600


https://twitter.com/ucddublin/status/1409473097221214211


https://twitter.com/Intel_IRL/status/1404469058951598080


https://twitter.com/ucddublin/status/1410208734899494915


https://twitter.com/ucddublin/status/1405841754184617985
https://twitter.com/ucddublin/status/1409800278858141697
https://twitter.com/ucddublin/status/1410176962807713793
https://twitter.com/ucddublin/status/1405913355987173382


https://twitter.com/rtenews/status/1403241839776382976


Science and Technology Vol.70 (coronavirus drugs)


https://twitter.com/ukinuae/status/1405554130471555072


https://twitter.com/SIDPharm/status/1403404688196784136
https://twitter.com/trtworld/status/1405351995473465349

https://twitter.com/AlphaTrader00/status/1370392844762972165


https://twitter.com/ScienceinBoston/status/1310959781780353024


https://twitter.com/CraigKellyMP/status/1409885443223658498
https://twitter.com/CraigKellyMP/status/1409817947694985220


https://twitter.com/ieDelhi/status/1402871650392035330
https://twitter.com/ibtimes_india/status/1401452191978868736


https://twitter.com/NewIndianXpress/status/1398194698565554179


Science and Technology Vol.69 (silver, etc.)


https://twitter.com/ScienceAlert/status/1240790663844827136


https://twitter.com/VXO/status/1258381348932251649


https://twitter.com/LaurelCoons/status/1139212824000028672


https://twitter.com/wef/status/1406902016543182850


https://twitter.com/cheddar/status/1407034789123739660
https://twitter.com/cheddar/status/1407142794284748802


Science and Technology Vol.68 (semiconductor materials)

Semiconductor Materials | @IEEEorg
What are the most used semiconductor materials?
The most used semiconductor materials are silicon, germanium, and gallium arsenide. Of the three, germanium was one of the earliest semiconductor materials used. Germanium has four valence electrons, which are electrons located on the outer shell of the atom.
The number of valence electrons in a semiconductor material determines its conductivity. While an important step in the evolution of semiconductor materials, germanium has largely fallen into disuse in favor of the current king of semiconductor materials—silicon.
Silicon has seen extensive use as a semiconductor material since the 1950s. The most abundant element on earth after carbon, silicon has four valence electrons and melts at a higher temperature than germanium (1,414 degrees Celsius in comparison to germanium’s 938.3 degrees Celsius).
Silicon is abundantly available in quartzite. Extraction, purification, and crystallization processes for silicon are both efficient and economical. The element crystallizes in a diamond form for a relatively robust bond, giving silicon crystals strong mechanical properties.
Gallium arsenide is the second most common semiconductor in use today. Unlike silicon and germanium, gallium arsenide is a compound, not an element, and is made by combining gallium, with its three valence electrons, with arsenic, which has five valence electrons.
Eight valence electrons make gallium-arsenide devices respond quickly to electric signals, making the compound well suited for amplifying the high-frequency signals seen in television satellites. Gallium arsenide has some limitations, however: the compound is more difficult to manufacture en masse than silicon, and the chemicals used in gallium arsenide production are quite toxic.
What are the most effective semiconductor materials?
In addition to gallium arsenide, the compound silicon dioxide has characteristics superior to silicon, allowing it to be used as an insulator, passivation layer, and a building layer in metal-oxide silicon (MOS) devices, a type of insulated-gate field-effect transistor. Silicon dioxide has a high dielectric strength and wider band gap than silicon, making it an effective insulator, and the compound is easily deposited on other materials.

Semiconductor Materials | @MiNetTechnology

Robust Growth And Strong Outlook For Semiconductor Materials (05/20/2021) | @SemiEngineering

Silicon Wafer Manufacturers – Materials Used to Make Semiconductors (15/04/2018) | @WaferWorldInc

Beyond silicon: the search for new semiconductors (03/10/2016) | @ConversationEDU

Silicon semiconductors to convert heat into power (13/07/2012) | @dwnews

Why are Silicon Wafers Used Semiconductor Chip Production? | @UniversityWafer

Silicon Semiconductor (10/27/2020) | @electrical4u1

What is silicon wafer? | SUMCO

How a semiconductor wafer is made | USJC

What is a Semiconductor Wafer? (08/25/2016) | @WaferPro

What are SiC Semiconductors? | @ROHMsemi

What is a Silicon Carbide Semiconductor? (05/01/2019) | @wolfspeed

WHAT ARE THE BENEFITS OF SILICON CARBIDE IN SEMICONDUCTORS? (25/03/2019) | @EuroScientist

Silicon Carbide (SiC) MOSFETs | @onsemi


Germanium (Ge) Semiconductors | AZO materials

Germanium Wafer – The Different Applications of Germanium as a Semiconductor (29/10/2019) | @WaferWorldInc

Germanium as Semiconductor – Properties | Nuclear Power for Everybody

Germanium Can Take Transistors Where Silicon Can’t (29/11/2016) | @IEEESpectrum

Silicon and Germanium | Hyperphysics

Semiconductor Materials | @tuvienna

Compound Semiconductor | Sumitomo Electric

Semiconductor Materials | TOSHIBA

Semiconductor Materials | pveducation.org

Virginia Semiconductor Inc.


World Vol.148 / Science and Technology Vol.67 (semiconductor)

Top USA and International Semiconductor Manufacturers | @Thomasnet

2020 STATE OF THE U.S. SEMICONDUCTOR INDUSTRY (PDF; 06/2020) | @SIAAmerica

The Semiconductor Supply Chain: Assessing National Competitiveness (PDF; 01/2021) | Center for Security and Emerging Technology (CSET)

Overview Of The Semiconductor Capital Equipment Industry (01/15/2019) | @SeekingAlpha
Memory chips are used to store data electronically in the form of bits (8bits = 1 byte). The most common types of memory chips made by the industry today are Dynamic Random Access Memory (“DRAM”) and NAND flash. DRAM is volatile memory, which means it temporarily stores each bit of data in a separate capacitor while the associated device is powered on. DRAM is commonly used by data servers and mobile devices. NAND (short for NAND flash) is non-volatile memory (“NVM”), which means it stores data even if the power is switched off. It’s called NAND because it’s a type of memory that resembles the NAND (not-and) logic. NAND is commonly used in memory cards and solid state drives (“SSD”). The major trend in memory today is the switch to three-dimensional (3D) memory where memory cells are built vertically, instead of horizontally (planar), which increases memory bit density.
Logic chips are the fundamental building blocks for digital electronics. Logic chips are constructed from connecting individual digital logic gates that perform logical operations of AND, OR and NOT on binary numbers. (This is where the NAND or not-and comes from). Logic chips perform calculations that drive computer processing.
Semiconductor manufacturers are generally focused on designing chips for various device applications. The semiconductor capital equipment industry (“semi-cap” for short) provides the equipment for these manufacturers.
The semiconductor industry is to electronics what the mining industry is to finished metal products. Taking this one step further, the semi-cap industry supplies the “picks and shovels” for the broader semiconductor industry.

The Main Types of Chips Produced by Semiconductor Companies (05/19/2020) | @investopia
Memory Chips; Microprocessors; Graphic Processing Units (GPUs); Standard Chips (Commodity ICs); Analog Chips; Mixed Circuit Semiconductors

Understanding Memory – An inside look at different memory types and how they work. (02/15/2018) | @semiEngineering
While logic chips work as the “brains” of an electronic device, performing functions using mathematical operations, memory chips store data. The basic building block of a memory chip is a cell, a tiny circuit with a capacitor (which stores data as a charge) and one or more transistors (which activate data). The capacitor is either charged or discharged, corresponding to the two possible data values (“1” or “0”), where this smallest unit of data is known as a “bit”.
The cells are arranged in a row and have a bit line structure that connects into a memory “address” called a word line. The address provides a means of identifying a location for data storage, and the word line forms an electrical path allowing all the memory cells on that row to be activated at the same time for storage (“write”) or retrieval (“read”). Data access is initiated with electrical signals – a row address strobe (RAS) and a column address strobe (CAS) – that together pinpoint a cell’s location within an array. If a charge is stored in the selected cell’s capacitor, these signals cause the transistor to conduct, transferring the charge to the connected bit line, causing a slight voltage increase that reads as a “1”.

The basics of microchips | ASML

MARKETS & PRODUCTS | ASM

Types of Semiconductor Devices | TOSHIBA

Guide to the major types of computer chips (03/26/2019) | @theburninhub

The global semiconductor silicon wafer market is expected to reach an estimated $17.4 billion by 2026 with a CAGR of 6.4% from 2020 to 2026 (06/14/2021) | @GlobeNewswire

Global Logic Semiconductor Market to Surpass $129 Billion by 2024 – Featuring Intel, Samsung Electronics, Xilinx, and NXP Semiconductors – ResearchAndMarkets.com (05/17/2019) | @BusinessWire

Global Logic Semiconductor Market – Industry Trends and Forecast to 2028 (05/2021) | DATA BRIDGE

What is Semiconductor Memory? | @ROHMsemi


Science and Technology Vol.66 (copper, silicon…/gallium…, etc.)

https://twitter.com/BoschPress/status/1399670818246856706


https://twitter.com/CoolMagSL/status/1312346765006434309

https://twitter.com/NadWGab/status/1038741609138061314


https://twitter.com/BLMAlaska/status/1396904156422676489


https://twitter.com/CastilloCopper/status/1397530576161280006


https://twitter.com/anasalhajji/status/1396674714643357696


https://twitter.com/Long2The/status/1397949672006815746


https://twitter.com/electronicspec/status/1386270037317664775

Tech Spotlight Casebook 2021 (w PDF; 05/2021) | @BelferCenter


https://twitter.com/TheSun/status/1397424760112488449


World Vol.140 (U.S., etc.)

https://twitter.com/RevereCopper/status/1288489799188393984


https://twitter.com/joncoopertweets/status/1396306525669445635


https://twitter.com/Ohmszy/status/1400964664469594116


https://twitter.com/MassEMA/status/1399763336003215362


https://twitter.com/andyvalencianoy/status/1400618215915544577


https://twitter.com/rogue_trippers/status/1400435589611204609

Belfer Center Annual Report 2020 (w PDF; 01/2021) | @BelferCenter


World Vol.139 (semiconductor)

10 LARGEST SEMICONDUCTOR COMPANIES IN THE WORLD (03/08/2021) | Zippia
Intel (INTC); Samsung Electronics; Taiwan Semiconductor Manufacturing Co. (TSMC); SK Hynix Inc.; Broadcom Corporation; Qualcomm; Micron Technology; Applied Materials; Nvidia Corporation; Texas Instruments Inc.

15 Biggest Semiconductor Companies in the World (01/07/2021) | @yahoolife
Intel (NASDAQ: INTC); Samsung; Taiwan Semiconductor Manufacturing Co. (NYSE: TSM); Qualcomm (NASDAQ: QCOM); SK Hynix; Micron Technology (NASDAQ: MU); Broadcom (NASDAQ: AVGO); Applied Materials (NASDAQ: AMAT); Texas Instruments (NASDAQ: TXN); NVIDIA (NASDAQ: NVDA); STMicroelectronics NV (NYSE: STM); Lam Research (NASDAQ: LRCX); Advanced Micro Devices (NASDAQ: AMD); Infineon Technologies; NXP Semiconductors (NASDAQ: NXPI)

20 Most Promising Semiconductor Companies (2017) | @SINewsUpdates
SIERRA CIRCUITS; AppliedMicro; Cadence Design Systems; Infineon Technologies; OmniPHY; Applied Materials; Broadcom; Cactus Semiconductor; Cavium; DXCorr Design; GeneSiC Semiconductor; GigaCom Semiconductor; Intel [NASDAQ:INTC]; InvenSense [NYSE:INVN]; KLA Tencor [NASDAQ:KLAC]; MaxLinear [NYSE:MXL]; Microchip Technology [NASDAQ:MCHP]; Moschip [BSE:532407]; Qualcomm [NASDAQ:QCOM]; Synopsys [NASDAQ:SNPS]

10 Biggest Semiconductor Companies (07/30/2020) | @Investopedia
Intel Corp. (INTC); Taiwan Semiconductor Manufacturing Co. Ltd. (TSM); Qualcomm Inc. (QCOM); Broadcom Inc. (AVGO); Micron Technology Inc. (MU); Texas Instruments Inc. (TXN); ASE Technology Holding Co. Ltd. (ASX); NVIDIA Corp. (NVDA); STMicroelectronics NV (STM); NXP Semiconductors NV (NXPI)

Top 50 Semiconductor Manufacturing Companies in the World (05/31/2021) | @rayguide
Top 10 Best Semiconductor Manufacturing Companies in the World; List of Next Top 40 Best Semiconductor Manufacturing Companies in the World

26 SEMICONDUCTOR COMPANIES EMPOWERING TECHNOLOGICAL GROWTH ACROSS INDUSTRIES (05/03/2021) | @BuiltIn
AMBIQ MICRO; BROADCOM; MARVELL; SENTONS; CELERA; NUVIA; CORSAIR; TEMPO AUTOMATION; APPLE; UNIVERSAL SEMICONDUCTOR; AMD; CADENCE DESIGN SYSTEMS; II-VI; GCT SEMICONDUCTOR; SYNTIANT; ALIEN TECHNOLOGY; REAL SILICON; LIGHTMATTER; SILICON TURNKEY SOLUTIONS; PATCHR.IO; VOLTA LABS; VITA INCLINATA TECHNOLOGIES; NANOGRAF CORPORATION; LIGHTELLIGENCE; DOVER MICROSYSTEMS; REVELHMI

TSMC dominance as the world’s largest chipmaker explained (04/02/2021) | @TechWireAsia

EU Weighs Deal With TSMC, Samsung for Semiconductor Foundry To Fix Supply Chain Risk (02/10/2021) | @business

2 charts show how much the world depends on Taiwan for semiconductors (03/15/2021) | @CNBC

Semiconductor Companies: Where Are They In The Chip Cycle? (05/24/2021) | @IBDinvestors

Boom quarter for top 10 semiconductor companies (05/25/2021) | @eeNewsEurope

Regaining The Edge In U.S. Chip Manufacturing (10/26/2020) | @SemiEngineering

How to Create a Vibrant Semiconductor Manufacturing Industry in the United States (07/13/2020) | @3DInCites

Top IC design companies worldwide 2020 (03/31/2021) | @StatistaCharts

Revenue of Top 10 IC Design (Fabless) Companies for 2020 Undergoes 26.4% Increase YoY Due to High Demand for Notebooks and Networking Products, Says TrendForce (03/25/2021) | @designreuse

Global Top Ten IC Design Companies Ranked by Revenue; Only Qualcomm and MediaTek Suffered Decreases (03/04/2019) | @designreuse

Fabless Semiconductor Companies Stocks List | @SwingTradeBot

Lagging but motivated: The state of China’s semiconductor industry (01/07/2021) | @BrookingsInst

Fab Or Fabless: Which One Do You Choose? (03/27/2017) | Sigenics

U.S. companies maintain largest share of fabless company IC sales | Semiconductor Digest

Fabless Companies vs. IDMs in the Semiconductor Industry (10/23/2012) | @Samsung

The Future of Semiconductor Industry from “Fabless” Perspective (PDF; 02/01/2008) | @Berkeley_EECS

Why Fabless Semiconductor Companies Rely on Tensoft SemiOps (w Video; 05/03/2021) | @erpsoftwareblog

5 Fabs Own 54% of Global Semiconductor Capacity (02/10/2021) | @EPSNewsonline
Samsung; TSMC; Micron; SK Hynix; Kioxia/WD
Five Semiconductor Companies Hold 53% of Global Wafer Capacity (02/13/2020) | IC Insights, Inc.

If Intel Builds A Fab In The U.S. It Should Focus On Developing Its Foundry Business Model (05/11/2020) | @Forbes

Top 10 Semiconductor Foundries of The World in 2020 (12/18/2020) | @Technosports

Top 5 Vendors in the Global Semiconductor Foundry Market from 2017 to 2021: Technavio (07/14/2017) | @BusinessWire
TSMC; GLOBALFOUNDRIES; UMC; SMIC; SAMSUNG

5 Top Semiconductor Fab Stocks to Invest in During the Global Chip Shortage: It’s a good time to be in the chip-manufacturing business. (04/02/2021) | @TheMotleyFool

Top 3 Semiconductor Foundry Stocks To Buy (03/21/2019) | @SeekingAlpha

Foundries Services | @AnySilicon

SK Telecom calls for bigger investment in semiconductor foundry (04/22/2021) | Aju Business Daily

SEMICONDUCTOR FOUNDRY MARKET – GROWTH, TRENDS, COVID-19 IMPACT, AND FORECASTS (2021 – 2026) | @MordorIntel

Leading semiconductor foundries revenue worldwide from 2019 to 2021, by quarter (in million U.S. dollars) | @StatistaChart

Can China Become the World Leader in Semiconductors?: China’s semiconductor industry faces considerable challenges in reaching global leadership status. But don’t assume it’s impossible. (09/25/2020) | @Diplomat_APAC

Foundries Multi-Projects Wafer (MPW) | Mirror Semiconductor, Inc.


World Vol.138 (G7, etc.)


https://twitter.com/TheParachuteReg/status/1400344553023016966


https://twitter.com/_The51/status/1399427389352931336


https://twitter.com/EUCouncil/status/1281310054096998403

https://twitter.com/CBItweets/status/1399244250408128513


https://twitter.com/G7/status/1398708341338263560


https://twitter.com/OECD_ENV/status/1397190858798243850


https://twitter.com/SkyNews/status/1399302473161101312


https://twitter.com/TomHall/status/1397303402858647552


https://twitter.com/Yankees/status/1390804948716302338


https://twitter.com/KOB4/status/1399777768632504320


https://twitter.com/KOB4/status/1399713599690481668


Science and Technology Vol.65 (semiconductor)




https://www.youtube.com/watch?v=DvYfs6rXKuE

Semiconductor Materials Types” Groups & Classifications | @ElecNotes
Germanium; Silicon; Gallium arsenide; Silicon carbide; Gallium Nitride; Gallium phosphide; Cadmium sulphide; Lead sulphide …

What is a Semiconductor? Types, Examples & Applications | @SyedZainNasir

Semiconductor Devices and Circuits, Applications | ElProCus

Different Types of Semiconductor Devices | @eh_org

Understanding the difference between n- and p-type semiconductors (03/03/2021) | Mesago Messe Frankfurt GmbH

P-Type, N-Type Semiconductors | LibreTexts

Semiconductors | lumen

Semiconductors | The Fact Factor

Types of Semiconductor Devices | @ToshibaUSA

Semiconductors | BYJU’S

Doped Semiconductors | Hyperphysics

Semiconductor (05/18/2020) | Investopia
Types of Semiconductors
Broadly speaking, semiconductors fall into four main product categories:
Memory: Memory chips serve as temporary storehouses of data and pass information to and from computer devices’ brains. The consolidation of the memory market continues, driving memory prices so low that only a few giants like Toshiba, Samsung and NEC can afford to stay in the game.
Microprocessors: These are central processing units that contain the basic logic to perform tasks. Intel’s domination of the microprocessor segment has forced nearly every other competitor, with the exception of Advanced Micro Devices, out of the mainstream market and into smaller niches or different segments altogether.
Commodity Integrated Circuit: Sometimes called “standard chips”, these are produced in huge batches for routine processing purposes. Dominated by very large Asian chip manufacturers, this segment offers razor-thin profit margins that only the biggest semiconductor companies can compete for.
Complex SOC: “System on a Chip” is essentially all about the creation of an integrated circuit chip with an entire system’s capability on it. The market revolves around growing demand for consumer products that combine new features and lower prices. With the doors to the memory, microprocessor and commodity integrated circuit markets tightly shut, the SOC segment is arguably the only one left with enough opportunity to attract a wide range of companies.

How Semiconductors Work (02/11/2021) | @HowStuffWorks

What are semiconductors? | @HitachiGlobal

Semiconductor Industry Association | @SIAAmerica

Semiconductor | Britannica

The Chip Shortage Keeps Getting Worse. Why Can’t We Just Make More? (05/06/2021) | @business
… it takes years to build semiconductor fabrication facilities and billions of dollars—and even then the economics are so brutal that you can lose out if your manufacturing expertise is a fraction behind the competition. …
Manufacturing a chip typically takes more than three months and involves giant factories, dust-free rooms, multi-million-dollar machines, molten tin and lasers. The end goal is to transform wafers of silicon—an element extracted from plain sand—into a network of billions of tiny switches called transistors…

Can Investors Profit From the Semiconductor Shortage?: Yes, you can. Here’s how. (05/28/2021) | @TMFZahrim,@TheMotleyFoolUK

The 2021 Technology Outlook for Silicon Carbide Semiconductors (03/08/2021) | @onsemi

Electronics Basics: What Is a Semiconductor? | @ForDummies

American Semiconductor, Inc

Semiconductor | @3M

Why there is a global semiconductor shortage, how it started, who it is hurting, and how long it could last (12/05/2021) | @scmp

America’s Semiconductor Industry Doesn’t Need $52 Billion in New Subsidies To Stay Ahead of China: Industrial policy is the wrong answer to a problem that mostly doesn’t exist. (05/27/2021) | @reason

Teradyne: Robots, 5G, Semiconductors – A Winning Formula For Sustainable Growth (05/30/2021) | @Teradyneinc,@SeekingAlpha

SEMICONDUCTOR ENGINEERING | @semiEngineering


Northern Europe Vol.6


https://twitter.com/denmarkdotdk/status/1364198353555386368


https://twitter.com/DreadBong0/status/1331990074519670785
https://twitter.com/WestIceland/status/1356605769999876099


https://twitter.com/IcelandPolitics/status/1369966705154359299


https://twitter.com/eu_eeas/status/1356306106633564160

https://twitter.com/SITEStockholm/status/1392135244661276685
https://twitter.com/SITEStockholm/status/1376519597994696711
https://twitter.com/SITEStockholm/status/1354708887778193413


https://twitter.com/Ricardo_Duque_/status/1355158575124017155


https://twitter.com/Lunduni_LUSEM/status/1316765747453014016


Science and Technology Vol.64 (gold, etc.)

https://twitter.com/thisisinsider/status/959843947743883264
https://twitter.com/prasetycio/status/1393518283807199236


https://twitter.com/ScienceUoA/status/1325693103538401280


https://twitter.com/UCBerkeley/status/1382772279839322115


https://twitter.com/ScienceAlert/status/743794142673788928


https://twitter.com/TheSun/status/1396954158951911429


World Vol.133 (newscomauHQ, NZStuff, CBCNews)


Science and Technology Vol.63 (elements, usages, food, etc.)


https://twitter.com/BerkeleyLab/status/936493569036075008


https://twitter.com/esa/status/1332587571461894153

https://twitter.com/AFP/status/1392464577221197832
https://twitter.com/JohannesburgIYP/status/1385556558214537218


https://twitter.com/SneakerNyame_/status/1391675348652285954


https://twitter.com/RedDwarfScience/status/658698480169406465
https://twitter.com/FireSafetyIre/status/1392513696820252675


https://twitter.com/rachaelvenables/status/1390590049071386627


https://twitter.com/Tobenna__/status/1310695542209630208


World Vol.129 (seaweeds, milk, etc.)


https://twitter.com/Bovidiva/status/1359803207942361088


https://twitter.com/rtenews/status/1389829715242987520


https://twitter.com/LifeWithJohn/status/1305461336281952256
https://twitter.com/TheHumaneLeague/status/1391032388537487362
 https://twitter.com/JohnOberg/status/1391357038731595777
 https://twitter.com/Luana84473134/status/1390986752299520001


Science and Technology Vol.62 (semiconductor, battery, raw materials, etc.)


https://twitter.com/ChemicalScience/status/1387364721980952582


https://twitter.com/DonH1187/status/1385596607899574280
https://twitter.com/GuillermoRein/status/1350225063086333956


https://twitter.com/IntEngineering/status/1385549011021672450


https://twitter.com/BoschPress/status/1368837651088822278


https://twitter.com/qualitywaterNE/status/1106662875135918080


https://twitter.com/IntEngineering/status/1338755675703418882


https://twitter.com/diaqpatel/status/1288739838099947521
https://twitter.com/RexChapman/status/1386004930360655875


Benelux Vol.6 (Netherlands Vol.12 / Belgium Vol.7)


https://twitter.com/Clingendaelorg/status/1387702848788566017


https://twitter.com/BrusselsTimes/status/1387301968604012546


https://twitter.com/aibrussels/status/1275813874068045825


https://twitter.com/VUBrussel/status/1388043698978631682


https://twitter.com/KU_Leuven/status/1339192529800073217


https://twitter.com/usembbrussels/status/1386664167793364997


https://twitter.com/epc_eu/status/1387729609941295111
https://twitter.com/epc_eu/status/1379441358717521925
https://twitter.com/epc_eu/status/1359778448525336580
https://twitter.com/CEPS_thinktank/status/1388146124322656258
https://twitter.com/CEPS_thinktank/status/1359492061666316290


https://twitter.com/Bruegel_org/status/1387774775012040708
https://twitter.com/Bruegel_org/status/1360212820328124416


World Vol.123 (Biden speech, Canada, raw materials, etc.)


https://twitter.com/BBCWorld/status/1386742493396537348


https://twitter.com/BertelsmannFdn/status/1386681474049478667


Science and Technology Vol.61 (semiconductor, etc.)


https://twitter.com/Stellantis/status/1379728897961570308


https://twitter.com/BristolUniPhys/status/1261949623398207488


https://twitter.com/BoschPress/status/1383024631422996487


https://twitter.com/ApogeewebNews/status/1072071797862883329


https://twitter.com/NordicTweets/status/1384763294351831040
https://twitter.com/NordicTweets/status/1384084104564543489


https://twitter.com/Reuters/status/1382788874422915074


https://twitter.com/NASA/status/1385307561700823042
https://twitter.com/NASA/status/1385325042381303825
https://twitter.com/NASA/status/1385338227280732166


World Vol.121 (semiconductor, U.S., etc.)


https://twitter.com/Stellantis/status/1380132672102666242


https://twitter.com/ukshahi/status/1375844346843394049


World Vol.120 (semiconductor, U.S., etc.)


https://twitter.com/declanganley/status/1225739457669795843