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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.

What Is the IUCN Red List?

The IUCN Red List is a collection of the best available scientific data analyzed and summarized by an international team of experts—such an assessment is not an opinion and not a guess. But such an assessment does not carry the force of law, and IUCN Red List Endangered status doesn’t mean the same thing as being considered endangered under the U.S. Endangered Species Act.

Waste not, want not: The science of fish pee.

If you like marine biology and bathroom humor, urine for a treat with this edition of *Science Stop.*

How to Read the Shark Attack File Report Like a Marine Biologist

A marine biologist discusses everything you can learn from the recent release of the annual, International Shark Attack File report and how to spot misleading information.

Even More Amazing Shark Facts You Haven’t Heard a Million Times

Sharks giving birth and what do tiger sharks eat? All this and more — shark facts explained by science expert, David Shiffman.

The Recipe for a Successful MPA

All marine protected areas (or MPAs) are not created equal—these factors help determine whether this important environmental tool can achieve its goals.

How Well-Intentioned Divers Are Hurting Shark Conservation

Scuba divers are always looking for ways to help protect shark species—here are some common conservation mistakes and ways that you can help protect sharks.

Shark Species That You’ve Probably Never Heard of, But Desperately Need Your Help

The most Critically Endangered shark species are largely unknown. These fascinating facts illustrate why they should get more attention and earn protection.

Sharknado and Sharktopus and Megalodon, Oh My!

Why are bad shark movies such as Sharknado and Sharktopus so popular? Shark expert David Shiffman explains why and how it effects the public's understanding of sharks and conservation.

Shark Tagging: Myths, Misconceptions and Nonsense

Though some divers believe otherwise, shark telemetry tagging is a minimally invasive, commonly accepted research method that advances science and conservation without harming sharks.