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Army Awards $2.2 Billion for ‘Microreactors’ On U.S. Bases

BRAD PLUMER

The move is part of the Trump administration’s efforts to spur the country’s largest expansion of nuclear power in more than three decades.

New NASA photos reveal 16 galaxies from across the cosmos in dazzling detail

Spirals, ellipticals, irregulars, oh my!

Is the keto diet better than the Mediterranean? New clinical trial reveals health benefits

In a clinical trial, people with obesity saw clear health benefits on the keto diet that they didn't see on two other popular eating regimens

NASA’s Roman Space Telescope will rewrite how we study the universe

Astronomers are lining up to leverage NASA's soon-to-launch Nancy Grace Roman Space Telescope, which boasts capabilities unlike any previous off-world observatory

Why glacial collapse likely caused the Nepal disaster—and why climate change will make these events more likely

The disaster has claimed hundreds of lives, and at least 1,400 people are missing

Near-Total Lunar Eclipse Will Turn Moon Blood Red

KATRINA MILLER

People in the Americas, Africa and Europe will have a chance to see Earth’s shadow create a near-total blood moon.

New Drug Approved by F.D.A. for Pancreatic Cancer Could Be First of Many

REBECCA ROBBINS AND CAROLYN Y. JOHNSON

Companies are testing dozens of similar drugs in cancers of the pancreas, lung, colon and more.

What Nepal's floods reveal about “cascading hazards”

The Nepal disaster appears to be a "cascading event," where one hazard seems to have triggered another, experts say

Climate change is supercharging El Niños, coral records show

Fossilized Galápagos corals show clear evidence that today's El Niños are much stronger than those in the past

Tropical Storm Dolly forms in the Atlantic

It's a weird meteorological coincidence on the heels of Dolly Parton's death

Some Scientists Have ‘Magic Hands’ in the Lab. This A.I. Is Learning Why.

CARL ZIMMER

Even the most adept researchers may not know exactly what they do to get successful results. An A.I. model is trying to figure it out by watching every move.

A Study of Brain Proteins Offers New Targets to Treat Autism

CARL ZIMMER AND AZEEN GHORAYSHI

Researchers hope their findings could help inform future therapies for people with severe autism.

Inside One of Peru’s Most Vulnerable Penguin Colonies

ANA ELISA SOTELO AND K. R. CALLAWAY

Scientists worry about the penguins’ future amid changing temperatures and warming waters this year.

Climate Change Raises Risk of Disasters Like Nepal Floods

MAXINE JOSELOW AND LEO SANDS

Glaciers and permafrost in the Himalayas are melting faster as temperatures rise, though scientists are still studying the exact causes of this week’s landslide.

Smuggled Turtles Saved at J.F.K. Are Recovering in the Bronx

RACHEL NUWER

China’s exotic pet market is driving a spike in animal smuggling, U.S. wildlife officials say. But these turtles are getting a second chance.