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U.S.SCIENCE SURPRISE

Dogfish study finds cortisol in sharks, upending a textbook belief

The finding in North Pacific spiny dogfish, a small shark species, challenges the belief that sharks and rays use a different steroid hormone for energy and stress.

On air: Hank Ledger, Vera Bullock and Dale Bearman on BBN Newsroom
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Photo: Doug Costa, NOAA/SBNMS · Public domain · Wikimedia Commons · altered by BBN
▶ As it aired · U.S.

Watch it as it aired: Hank Ledger, Vera Bullock and Dale Bearman on this story, from BBN Newsroom at 3:33 PM ET. Cartoon anchors, real headline: the facts are Phys.org's, the jokes are ours.

Photo: Spiny dogfish
Photo: Doug Costa, NOAA/SBNMS · Public domain · Wikimedia Commons · altered by BBN

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  1. Hank Ledger · Lead AnchorNew study of North Pacific spiny dogfish finds cortisol in their blood, a stress hormone scientists long believed sharks and rays never made.

  2. Dale Bearman · Chief Skeptic & ContributorSo even the sharks have been stressed this whole time, and nobody checked. Typical.

  3. Vera Bullock · Co-AnchorIn a few minutes, did the internet owe a hockey star an apology?

  4. Hank Ledger · Lead AnchorApparently the shark's bloodwork was the calmer story.

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