I used to think the talk of Martian ejecta finding their way to Earth was absurd. After all, how could someone know that? Of course, not knowing anything about spectrographic analyses of the composition of such rocks and meteorites, such doubt is unsurprising. But our rovers on Mars are kicking ass and taking names, and one of them has come across a rock that has the same chemical signature as a meteorite that hit India in the 19th Century. Check it out and tell me again why the space program is unimportant.
(Thanks to InstaPundit for the tip.)