What killed the dinosaurs? It's history's ultimate murder mystery, and for decades the prime suspect has been a giant asteroid. New data suggest that it struck right before the extinction. But scientists say it still may not tell the full story of what happened to the dinosaurs.
San Francisco's library system responded to the city shelter's need for newspapers with donations of its used copies. But dogs are "poop machines," as a shelter spokesman says. So the problem may not be quite solved.
The Supreme Court is expected to rule on two cases involving detector dogs and the limits of reasonable search and seizure. Surrounding the cases are larger questions about the effectiveness of detector dogs and the legal questions that arise when they are used for law enforcement.
Wisdom, a Laysan albatross who nests at the Midway Atoll National Wildlife Refuge in the North Pacific Ocean, is thought to be at least 62 years old. She's raised an estimated 30 to 35 chicks over the years and flown at least 2 million miles, scientists say.
The U.S. Fish and Wildlife may upgrade the wood stork's status from "endangered" to "threatened." But some environmentalists and the Audubon Society says that in south Florida, the bird's population is still a long way from reaching a full recovery.
Zac Unger moved to Churchill, Manitoba, to cover the decline of the polar bear. It was 2008, and the adorable predators had become symbols in the battle over climate change. But the story he ended up writing in his new book was more complicated than he expected.
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