Promising blood test could help to predict breast cancer recurrence

Mass shootings can be contagious, research shows

A scientist witnessed poachers killing a chimp

We need a new science of progress

America’s youngest kids need good teachers. Why is it so difficult to find them?

Our three favorite scientific breakthroughs this month

American flags planted on the moon still there, experts say

Your state probably isn't prepared for droughts or floods

Letters to the Editor: Lady Liberty never lifted her lamp at the southern border

Czech protesters are trying to defend democracy, 30 years after the Velvet Revolution. Can they succeed?

Poof! Science reveals how easily a magician can fool you

Mission to rare metal asteroid could spark space mining boom

NBC's Lester Holt to get Walter Cronkite journalism award

A surprising idea about the risks of extinction

How flushing contact lenses down the toilet threatens the environment

These dogs are getting a cancer vaccine. If it works, humans could be next

Are there potential downsides of going to 100 percent renewable energy?

To map a coral reef, peel back the seawater

Discoveries could be 'missing link' to understanding Native American ancestry

The National Zoo’s female Asian water dragon successfully reproduced without a male