comet lander

You may be carrying comet dust in your bones and blood. Probe Philae has shown that, now, we can go collect the original stuff. That's where science becomes magical, says commentator Marcelo Gleiser.

Fearing that Philae's batteries won't last past Friday, engineers are looking at possible ways to help it get more power from its solar panels. One ray of hope: Its comet is heading toward the sun.