Mars Magnetism Mars Magnetism Audio will be available later today. Facebook Twitter Google+ Email September 21, 199712:00 AM ET Last week, the Global Surveyor entered Mars' orbit, circling hundreds of miles above the planet. Already, it's discovered one surprising thing—Daniel finds out more from Andrew Fracknoy, the All Things Considered astonomer. Facebook Twitter Google+ Email We no longer support commenting on NPR.org stories, but you can find us every day on Facebook, Twitter, email, and many other platforms. Learn more or contact us.