We've Observed Mars for Decades, But Still Have No Big Theories

Mars geologist Phil Christensen says we're still short on understanding the red planet. "The devil continues to be in the details," he said at this week's Eighth International Conference on Mars. Astrobiologist David Des Marais said Mars research today adds up to "lots of observations but no overarching… » 7/26/14 6:11pm 7/26/14 6:11pm

Two Small Rocks From Space, Two Giant Lawsuits For Mankind

Forty-five years ago yesterday, on July 20, 1969, Edwin "Buzz" Aldrin and Neil Armstrong stepped into history. Shortly before 11 p.m. Eastern time, the pair emerged from their landing craft, the Eagle, and became the first men to set foot on the moon. This week, On Remand looks back at that "one giant leap for… » 7/23/14 11:58am 7/23/14 11:58am

These Insanely Detailed Maps Of Mars Are The Most Accurate Yet

After 16 years of painstaking work, the U.S. Geological Survey has released a series of geologic maps that offer the most thorough representation of the Red Planet's surface to date. The revealing project will help mission planners target future areas for robotic — and potentially human — exploration. » 7/15/14 4:00pm 7/15/14 4:00pm