Sharks Face a Growing Threat in Warming and Acidic Seas
Like many species, sharks face a looming threat: a changing climate. The most ancient sharks date back to 450 million years ago, during a period when the oceans were much warmer and much more acidic — an environment today's sharks aren't necessarily familiar with. As greenhouse gases cause global temperatures to rise, however, sharks are once again swimming in oceans that are warmer and more acidic, forcing them to adapt to their new environment.
