Acidifying Oceans Could Eat Away at Sharks' Skin and Teeth
b'For hundreds of millions of years, sharks have been roaming Earth\\u2019s oceans making meals out of a huge range of critters, from the whale shark gobbling up tiny krill to the 60-foot megalodon that could take down whales. Their ancestral line has survived mass extinctions with ease, most notably the catastrophe that took down the dinosaurs.\\nLearn more about your ad choices. Visit podcastchoices.com/adchoices'