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The president hasn't yet signed up but 2.2 million Russians have been vaccinated, countries are signing up for doses — and our Moscow reporter rolled up his sleeve.

Hair is soft compared with steel, but shaving can dull a razor surprisingly quickly. A new study examines exactly how a strand of hair can chip and crack a sharp blade.

Scientists say their goal was to rediscover a type of chevrotain that had been "lost to science" for nearly 30 years. Chevrotains are the world's smallest hoofed mammal, or ungulate.

An investigation by CapRadio and NPR's California Newsroom has found that Gov. Newsom overstated, by an astounding 690%, the number of acres treated with fuel breaks and prescribed burns in forestry projects aimed at protecting the state’s most vulnerable communities.

Climate change is hitting the oceans hard, both warming and acidifying the water. Ocean scientists are hoping the Biden Administration dives in quickly to address it.

Fingertip devices that measure oxygen in the blood can sometimes give erroneous readings in people with dark skin, doctors report. The devices can say oxygen levels are normal when they're not.

The technology entrepreneur made his fortune in the heyday of the dot-com era, before pivoting to lead the online shoe company — despite knowing little about shoes.

President Biden has a long to-do list when it comes to cybersecurity. He has to deal with a major cyber breach still under investigation, and there's a running debate over online conspiracy campaigns.

The video has been viewed millions of times on YouTube via links that are replaced as quickly as the video-sharing service can remove them for violating its policy against "COVID-19 misinformation."

India's COVID-19 caseload plummeted to record lows in February. Now a startling spike is causing health systems — and possibly law and order — to break down. What went wrong?