Sharks have been on this planet for more than 400 million years. They're older than the first trees, the North Star, and even the rings of Saturn. They've seen and been through it all — but the mounting 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, severely damaging the ability of these apex predators to feed and defend themselves. Not even their famed ability to regrow their rows of deadly chompers could be enough to offset the phen

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