Trilobites: An Ancient Step Toward Modern Birds
Anchiornis was a feathered dinosaur, about the size of a pigeon and incapable of flight. Its wings say a lot about how birds came to be.
Q&A: The Sands of Time
The depth of sand on a beach can vary considerably from location to location. Human intervention often doesn’t last for long.
Here’s What Oil Drilling Looks Like in the Arctic Refuge, 30 Years Later
Satellite images of the Arctic National Wildlife Refuge show the effects of an oil well that operated there in the mid-1980s.
Trilobites: An 8th Planet Is Found Orbiting a Distant Star, With A.I.’s Help
A Google neural network analyzed data collected by NASA and helped astronomers detect another planet around a star some 2,500 light years away.
As Zika Babies Become Toddlers, Some Can’t See, Walk or Talk
They are 2 years old, but developmentally they are 6 months old. The children most severely affected by Zika face a lifetime of care, new research...
How Global Warming Fueled Five Extreme Weather Events
Scientists analyzed 27 extreme weather events from 2016 and found that global warming was a “significant driver” for most of them. We look at five...
Marijuana and Vaping Are More Popular Than Cigarettes Among Teenagers
The latest national survey of adolescent drug use found declining use of most substances, including alcohol, tobacco, prescription opioids and...
Trump’s E.P.A. Chemical Safety Nominee Withdraws
The nominee, Michael L. Dourson, had faced criticism on several fronts for his ties to the chemical industry.
A ‘Game Changer’ for Patients With Irregular Heart Rhythm
Rapid, erratic heartbeats — called ventricular tachycardia — can lead to sudden death. An experimental radiation treatment has eased the condition...
Trilobites: The Great Red Spot Descends Deep Into Jupiter
The iconic storm plunges 200 miles beneath the clouds of the solar system’s largest planet, and possibly much deeper, according to data from NASA’s...
Scientists Link Hurricane Harvey’s Record Rainfall to Climate Change
Two studies of the storm that overwhelmed Houston last summer say global warming made the rain much worse.
Baby Born With Heart Outside Her Body Is Saved by U.K. Surgeons
Vanellope Hope Wilkins, who had her first operation within an hour of birth, is believed to be first newborn in Britain to survive the corrective...