Ilse Cleeves is lead author of a paper that concludes up to half of our solar system’s water is older than the solar system itself. The implications for life across the galaxy are profound. Emily Lakdawalla reports in from the road about the Red Planet’s encounter with a comet and the discovery of a target past Pluto for New Horizons. Bill Nye salutes the winners and losers in risky space ventures, and Bruce Betts introduces a new series of Random Space Fact videos on What’s Up.
Bill Saxton, NSF / AUI / NRAO
The water in your bottle might be older than the Sun
Researchers have theorized that up to half of Earth's water is older than the sun. It likely formed in the cold molecular cloud that spawned our solar system.