Sharks have been on this planet for more than 400 million years. They're older than trees, the North Star, and even the rings of Saturn. They've seen and been through it all. But the horrifying effects of human driven climate change could be what finally proves too much for these ancient beings. As we continue to pump astronomical amounts of carbon dioxide into the atmosphere, nearly a third of it gets absorbed by the ocean, gradually making its water more acidic. For sharks, the consequences could be horrifying. New research suggests that this acidifying could dissolve and weaken shark teeth, […]