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Joe Biden will be sworn in as the 46th president this week. A new administration means a new approach to the existential threat of climate change, a threat the president-elect calls, “the greatest challenge facing our nation and the world."

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.

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."

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.

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.

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.

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.

House Speaker Nancy Pelosi continued a series of phone conversations with Treasury Secretary Steven Mnuchin but it wasn't clear when legislation might pass or what precisely it would include.

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.

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.