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David Shiffman, Ph.D.

Dr. David Shiffman is a marine conservation biologist who studies threatened sharks and how to protect them.

Amazing Shark Facts You Haven’t Heard a Million Times

A science expert lists his favorite amazing shark facts, including facts about Greenland sharks, bull sharks and more.

Sunscreen, Straws and Subtlety: The Dangers of Oversimplifying a Complex Environmental Problem

Why plastic-straw bans and sunscreen bans may not be the best solutions for the environment.