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Trump issues executive order aimed at rewriting childhood vaccine schedule

The president called for the combined measles, mumps and rubella (MMR) vaccine to be split into separate shots, despite decades of research showing that the MMR vaccine is safe and effective

What to Know About Europe’s Total Solar Eclipse: Where to See It and How to Watch Safely

KATRINA MILLER

We’re answering some questions about the solar eclipse on Aug. 12, and providing a place for you to ask more of them.

Humans’ sense of smell is still evolving

A genetic study shows how smell capabilities were maintained in a hunter-gatherer population

First-of-its-kind clinic treats psychedelic side effects

As psychedelic therapies expand, new clinics treat uncommon long-term harms

The birth of modern life was fueled by poop, new theory proposes

The Cambrian explosion is a critical moment for life on Earth—and it may have been all about poop

Has science finally made up its mind about coffee’s health benefits?

Doctors used to warn coffee drinkers. Now research reassures them

Scientists are closer than ever to understanding the power of the vagus nerve

The vagus nerve is the autonomic nervous system's highway, connecting every major organ

107 years ago, the Eddington total eclipse experiment helped prove Einstein’s theory of relativity

The Eddington experiment used a solar eclipse to prove Albert Einstein's general theory of relativity

National Academy of Sciences pulls climate chapter from judges’ manual

President Donald Trump and other Republican officials had criticized this chapter as biased against fossil fuel companies

Land speed record holder shatters hydrogen car record with 406-mph race

Andy Green holds the land speed record, having hit 763.035 miles per hour driving a more conventional vehicle in 1997

Can AI make mathematics more human?

Mathematician Yang-Hui He explains why artificial intelligence is fundamentally transforming mathematical work—and that's a good thing

A.I. Offers Hope for Men With Infertility, Spotting ‘Hidden’ Sperm

ANDREW ZALESKI

New technology may make it easier for men with extremely low sperm counts to have biological children.

Trump Administration Kills Annual Arctic Report Card

RAYMOND ZHONG

The top of the world is warming faster than any other region. For 20 years, the Arctic Report Card chronicled the extraordinary transformation.

The Perseid Meteor Shower Is Peaking. Here’s How to Watch.

KATRINA MILLER

The Perseids will be most active on Wednesday into Thursday morning, on the moonless night after a total solar eclipse.

Frenzy for Solar Eclipse Glasses Takes Over London

JONATHAN WOLFE

Ahead of Wednesday’s rare cosmic event, thousands of people in London are searching for protective eyewear, as prices surge and stocks sell out.