Scott Kelly
GOP Sen. Martha McSally's Campaign Ad Actually Shows Rival's Twin Brother
The photo used in the ad shows retired astronaut Scott Kelly, not Mark Kelly, the Democrat leading McSally in polls.
NASA Astronaut's DNA Actually Changed in Space
Seven percent of Scott Kelly's genes did not return to normal when he got home.
Year in Space Changed Scott Kelly's DNA
The changes happen as soon as an astronaut gets into space.
Scott Kelly Urges Leaders to Protect the Earth
"The perspective of Earth from space is incredible," he writes. But the views from space "also show us changes; we need leadership to protect it."
Elementary School to Be Renamed for Astronaut Twins
Scott and Mark Kelly attended Pleasantdale Elementary School in their New Jersey hometown.
Watch: Scott Kelly Talks About His Year in Space
Just days after his return from the International Space Station, Scott Kelly sits down for a look back at his experience.
19 Highlights From Scott Kelly's Year in Space
A look back at Kelly's nearly full year at the International Space Station.
How to Watch Scott Kelly Return From His Year in Space
The astronaut is about to come back to Earth after spending 340 consecutive days in space along with Russian cosmonaut Mikhail Kornienko.
Scott Kelly to Host Third Rock Radio From Space Station
The astronaut is scheduled to host a two-hour program Thursday at 5 p.m. ET.
Astronaut Scott Kelly Plays Liquid Ping-Pong in Space
NASA are again proving why being an astronaut is amazing
First Flower Blooms in Space
The successful blooming of the zinnia flower is a precursor to plant growth on Mars, according to NASA.
Watch: Astronauts Arrive at the International Space Station
A new crew is en route to the ISS. NASA TV has coverage of the docking and hatch opening.
Three Astronauts Return to Earth, Three Others to Head to Space
One crew returns from the ISS after 141 days in space as another prepares to launch on Tuesday.
Astronauts Complete Spacewalk After Finding Ammonia Leak
Several ammonia leaks and minor system failures with the space station's cooling have occurred over the past five years.
Scott Kelly and Kjell Lindgren Take a Spacewalk
The two astronauts exited the International Space Station for a six-and-a-half-hour spacewalk.
International Space Station Astronauts Eat Red Romaine Lettuce Grown in Space
This feast is the first of its kind.
Stephen Hawking, Google, Obama and Others Congratulate NASA on Pluto Flyby
Videos, tweets and a Google doodle honor the historic moment in space exploration.
A Year in Space: NASA's Latest Efforts to Ready Humans for Mars
Scott Kelly's time on the ISS will prepare us for our deepest space explorations yet.