Ever wonder why sharks have so many differently shaped teeth or why they keep regrowing throughout their lives? Dr. David Shiffman discusses one of sharks' most iconic—and fascinating—features.

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In this edition of Ask a Marine Biologist, Dr. David Shiffman answers a question about what’s still lurking in the deep.

In this edition of Ask a Marine Biologist, Dr. David Shiffman answers a question about how divers feeding sharks impacts the broader ecosystem.

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Since 2016, the hashtag #SharksNearMe has been used to document the golden age of sharks in pop culture.

In this edition of Ask a Marine Biologist, Dr. David Shiffman offers some general career advice.