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Millions of people enrolled in President Barack Obama's signature Affordable Care Act. But the future of that health care legislation under President Donald Trump and a Republican-led Congress...
Flacon 9 rocket launch

After Its Next Launch, SpaceX Will Probably Only Use Reusable Rockets

Using reusable rockets could make spaceflight cheaper — and it's one of founder Elon Musk's main goals.

  Spaceflight

1:44Gene Cernan in the Lunar Module
NASA

Gene Cernan Really Wanted Us To Return To The Moon

0:56An plane flies in front of the moon
Getty Images

This Company Wants To Mine The Moon. Now It Has The Money To Get There

A Falcon 9 rocket on the launchpad
SpaceX

Why Rocket Explosions Aren't Dampening SpaceX's Ambitious Plans

0:33SpaceX CEO Elon Musk talking to reporters.
Getty Images

SpaceX Finally Explains Why Its Rocket Exploded In September

1:20A vulture in front of a space shuttle
Getty Images

How To Keep Birds From Sabotaging The US Space Program

2:25Renderings of crew capsules from SpaceX and Boeing.
SpaceX, Boeing

Wasn't The US Supposed To Launch Astronauts Again In 2017?

1:14U.S. Astronaut Alan Shepard
NASA

The Underwear Oversight Of The Early US Space Program

0:52Former astronaut John Glenn
NASA

John Glenn, Astronaut And Former US Senator, Dies At Age 95

1:10Atlas rocket
Getty Images

Want To Design A Rocket? Here's Your Chance

0:40Peggy Whitson, Oleg Novitskiy and Thomas Pesquet
Getty Images

56-Year-Old Astronaut Becomes Oldest Woman In Space

1:13NASA's space poop challenge banner.
NASA

The Space Poop Challenge Is Something You Might Actually Want To Win

1:16The International Space Station
Getty Images

What It Takes To Bring Astronauts To And From The ISS

0:38An artists rendering of the Schiaparelli lander separating from a larger craft to then attempt to land on Mars.
European Space Agency

A Computer Glitch Likely Crashed A Robot On Mars

1:13An astronaut on a space treadmill.
NASA

Looks Like Our Backs Really Aren't Made For Space Travel

0:56An artist rendition of the Schiaparelli lander.
ESA / ATG Media Lab

Turns Out Landing On Mars Is Still Pretty Tricky

1:18The Schiaparelli Mars lander.
European Space Agency

The Search For Life On Mars Is Heating Up And Getting Crowded

0:49A view of Mars.
NASA

President Obama Sets His Sights On Mars

0:50Rosetta ends its mission on comet 67P.
European Space Agency

A Gentle Ending To Rosetta's 12-Year Mission

2:23Proposed colonists on Mars.
NASA

If You Want To Live On Mars, Be Prepared To Build Your Own Society

0:44A rendering of the Interplanetary Transport System approaching Mars
SpaceX

Elon Musk Presents Transportation Plans For Colonizing Mars

:48An animation of Mars.
NASA

Elon Musk's Plan To Colonize Mars Starts With This Rocket Engine

1:18Chinese astronauts wave before boarding their spacecraft.
Getty Images

Why The US And Russia Can Share A Space Station — But China Can't

1:38Earth as seen from more than 40,000 miles away by NASA's Messenger spacecraft
NASA

How Will Mars Crews Cope With Watching Earth Fade Into The Distance?

0:52A Mars landscape is seen in a picture taken by the panoramic camera on the Mars Exploration Rover Spirit January 8, 2003.
Getty Images / NASA / Jet Propulsion Laboratory / Cornell University

Congress Could Make A Manned Mission To Mars Mandatory

1:03An artist's illustration of the Tiangong-1 space station.
Chinese Manned Space Engineering Office

Chinese Officials Aren't Sure Where Their Falling Spacecraft Will Land

1:15The interior of SpaceX's planned crew capsule
SpaceX

America Could Wait Longer Than Expected For Next Manned Spaceflight

1:08NASA astronaut Jeff Williams.
NASA

NASA Astronaut Jeff Williams Is Home After Breaking Spaceflight Record

:49Photos from the camera on the Rosetta spacecraft show where the Philae lander landed on comet 67P.
European Space Agency

After Months Of Silence, Scientists Finally Find The Philae Lander

1:01A photo of Jupiter's north pole
NASA

Photos Of Jupiter's North Pole Give A Glimpse Of What's To Come

0:59Facebook CEO Mark Zuckerberg
Getty Images

Facebook's Internet Plans Blow Up With A SpaceX Rocket