Chimps and humans have similar genes. Genetically, we're 97% identical. So why are we so different? The answer has to do with how our genes work and interact.
Dee Boersma - sometimes called "the Jane Goodall of penguins - said 2010 was a hard year for Punta Tombo penguins. This is one of the world’s largest breeding colonies.
Vietnam's Hang Son Doong cave has underground spaces large enough to hold a city block of skyscrapers. Read more about the world's biggest cave passage.