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Paraplegic engineer becomes the first wheelchair user to blast into space

You finally got a doctor’s appointment. Here’s how to get the most out of it

How sewage can be used to heat and cool buildings

Nodding off is dangerous. Some animals have evolved extreme ways to sleep in precarious environments

Hubble Space Telescope spies dusty debris from two cosmic collisions

Along the Texas Coast, a new sanctuary aims to protect the endangered and rare whooping crane

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Rain creates a crimson spectacle on Iran’s Hormuz Island for the first time this year

Catch the Ursid meteor shower as it peaks just before Christmas

Senate confirms Jared Isaacman as NASA administrator in do-over after Musk feud

Trump administration moves to dissolve national climate research lab in Colorado

Saturn’s moon Titan may not have a buried ocean as long suspected, new study suggests

To find living donors for kidney transplants, a pilot program turns to social networks

A photographer finds thousands of dinosaur footprints near Italian Winter Olympic venue

As reefs vanish, assisted coral fertilization offers hope in the Dominican Republic

Interstellar comet keeps its distance as it makes its closest approach to Earth

Before megalodon, researchers say a monstrous shark ruled ancient Australian seas

Tips for viewing the peak of the Geminids meteor shower

In reversal, Moore funds climate change study he previously vetoed

Trump administration delays decision on federal protections for monarch butterflies

Study finds humans were making fire 400,000 years ago, far earlier than once thought

Fairfax Co. middle school eyeing 14th straight Science Olympiad state title

This dinosaur skull is one of just a few of its kind — and it’s going on display in DC

Blend of unusual weather conditions brings trillions of gallons in persistent rain to the Northwest

Ocean warmed by climate change fed intense rainfall and deadly floods in Asia, study finds