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How to tell a comet from an asteroid and a meteor from a meteorite

A field guide to the space rocks you might see streaking across the night sky

NASA prepares to launch an unprecedented mission to save a dying space telescope

Inside the quest to rescue NASA's aging Swift observatory

Gene-editing startups are using CRISPR to treat diseases

A handful of start-up firms are testing therapies that target specific epigenetic markers to treat everything from high cholesterol to a rare muscular disorder

Turtles Are Really Weird Animals. Where Did They Come From?

SARA NOVAK

The origin of turtles has puzzled scientists. A new study provides more evidence that these shelled reptiles share a common ancestor with crocodiles and birds.

Another Trump Administration Payment to Stop Offshore Wind Farm

MAXINE JOSELOW

It was the fourth such deal struck by the administration to get companies to forfeit their offshore wind leases.

NASA Aims to Catch a Falling Space Telescope and Push It Back Up

KENNETH CHANG

A rescue mission will soon be underway for NASA’s Swift telescope.

Extreme heat is setting in for July 4. Here’s what to know

A prolonged, intense heat wave will make temperatures feel as hot as 115 degrees Fahrenheit in the eastern U.S. this week

How to spot an AI-generated face, according to science

Training people to pay attention to the right visual cues nearly doubled how accurately they could spot AI-generated faces