Contributor

We can't change when or how long we live. All that really counts is what we do. Space exploration has technical, political and mental challenges, but rewards us with surprising knowledge. It's one of humanity's noblest endeavors and the focus of my work since 1987.

Author Stories
Dec 17, 2014 03:30 PM ET
NASA’s Mars rover Curiosity’s discovery of organic compounds in the ground and plumes of methane in the air opens two potentially related investigations into whether or not the planet most like Earth in the solar system also hosted life.
Dec 16, 2014 01:30 PM ET
A gas strongly associated with life on Earth has been detected again in the Martian atmosphere, opening a new chapter in a decade-old mystery about the on-again, off-again appearance of methane on Mars.
Dec 16, 2014 04:15 PM ET
NASA’s rover Curiosity has found organic compounds on Mars, the first definitive proof of building blocks for life on the Red Planet that also exist on Earth.
Dec 12, 2014 03:28 PM ET
Sculpting the dunes on Saturn’s moon Titan took 33,000 Earth years, or 3,000 years in Saturn time, new analysis of images taken by NASA's Cassini spacecraft shows.
Dec 10, 2014 02:00 PM ET
The European mission has discovered that the water locked in Comet 67P/Churyumov-Gerasimenko doesn't match the water on Earth.
Dec 9, 2014 09:20 AM ET
To account for a lake that lasted for millions of years means the Martian atmosphere would have had to be far thicker and loaded with water.
Dec 8, 2014 12:20 PM ET
The mountain that NASA's Mars rover Curiosity is exploring appears to have once been a lake.
Dec 7, 2014 06:50 AM ET
The spacecraft woke at 9:30 pm from its 18th hibernation period since its 3-billion-mile voyage began in January 2006.
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