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Using sharks to study ocean oxygen, and what ancient minerals teach us about early Earth

Science Magazine Podcast

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Shark Fishing in Low Oxygen Areas Off the Northwest Coast of Africa

Researchers have found that blue sharks are spending more time in low oxygen water off the northwest coast of Africa. They think this is because it's corralling fish they like to eat into a smaller zone, which means easier fishing for them. The concern is that as sharks swim closer to the surface in these low oxygen areas, there may be an increased risk of being caught and eaten by humans.

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