Podcast: Asteroid impacts, comet dust, and missing Y chromosomes

first_imgDid asteroid impacts spark life on Earth? Why is comet dust cropping up in Antarctica? And does smoking erase Y chromosomes? Science’s Online News Editor David Grimm chats about these stories and more with Science’s Sarah Crespi. Plus, Erich Jarvis sums up the findings from sequencing 40-plus bird genomes.last_img

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