NORAD's annual tracking of Santa Claus has begun - watch live

The 2020 Atlantic hurricane season was a record-breaker, and it's raising more concerns about climate change

Why Biden will find it hard to undo Trump's costly 'America first' trade policy

Pfizer study shows its COVID vaccine is more than 90% effective

Russian media may be joining China and Iran in turning on Trump

OxyContin maker Purdue Pharma pleads guilty to federal criminal charges in $8 billion settlement

WHO urges world leaders to stop using lockdowns as primary control method for coronavirus

Allies and foes watch as Trump fights the coronavirus

COVID-19 vaccines: Open source licensing could keep Big Pharma from making huge profits off taxpayer-funded research

How and when will we know that a COVID-19 vaccine is safe and effective?

The weak dollar: why it won't be replaced as global reserve currency

Zoom restores most users as video platform suffers shutdowns to start school, work week

100 days without COVID-19: how New Zealand got rid of a virus that keeps spreading across the world

5 reasons Chinese students may stop studying in the US

What is ammonium nitrate, the chemical that exploded in Beirut?

How other countries reopened schools during the pandemic – and what the US can learn from them

Critics: Changing information about coronavirus transmission, impact leads to backlash over policy decisions

The WHO often has been under fire, but no nation has ever moved to sever ties with it

Aerosols are a bigger coronavirus threat than WHO guidelines suggest – here's what you need to know

U.S. to withdraw from World Health Organization

Mexico closes border before holiday weekend

100 degrees in Siberia? 5 ways the extreme Arctic heat wave follows a disturbing pattern

A massive Saharan dust plume is moving into the southeast US, bringing technicolor sunsets and suppressing tropical storms

Crop pathogens are more adaptable than previously thought