Researchers in New York are reporting that, for the first time, they've used cloning techniques to successfully create human embryos in the lab. Guy Raz talks about the ethical implications of this research with Insoo Hyun, associate professor of bioethics at Case Western Reserve University.
Daniel Shechtman's discovery that atoms could fit together inside of crystals in a nonrepeating pattern fundamentally changed the way chemists look at solid matter. His findings were widely criticized at first, and it took years for Shechtman to prove he was right.
On the craggy bluffs of Mistaken Point in Newfoundland, the wind and waves are licking away the rocks to reveal the oldest animal fossils on Earth. Locals are promoting the fossils, and the creatures are drawing a crowd. And now they are an economic engine for an area that had hit tough times.
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