An all-sky image of the Milky Way (Serge Brunier/NASA) As promised, here’s an excerpt from astronomer Ken Croswell’s “Star Struck,” a National Geographic featured article from the December 2010 edition that takes us on a fascinating tour of the Milky Way. Croswell discusses recent...

The December 2010 edition of National Geographic A couple of months ago I was contacted by National Geographic magazine notifying me that one of their writers had quoted me in an article for their December issue. Pretty cool, I thought. But then I forgot all about it. Then, I received a note from the...

Are those Martian fossils in meteorite ALH84001? (NASA) “Panspermia” is a hypothesis that life is transferred from planet-to-planet and star system-to-star system through some interplanetary or interstellar means. But for panspermia to work, this life needs to be sufficiently protected...