Great white sharks in hot water, and more…
6/19/202654 min
Some of the oceans biggest, most powerful predators, like certain sharks and tuna, are “mesothermic” or warm-bodied. Running hot allows them to rapidly convert their food to energy and heat, helping them swim faster and hunt in cold waters. But that advantage may become a disadvantage in a warming climate, meaning these fish need to find new ways of cooling off, or face a new threat to their survival.
PLUS:
- Ancient Peruvians traded parrots across deserts and mountains
- From the archive: David, Jay and Bob, and Quirks & Quarks' origin story
- Sea cucumber 'zombie tissue' straddles the line between life and death
- Dream engineering may help you solve problems in your sleep
Clips
Transcript preview
First 90 secondsSpeaker 10:00
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Speaker 20:28
[upbeat music] This is a CBC podcast.
Bob McDonald· Host0:32
[upbeat music] Hi, I'm Bob McDonald. Welcome to Quirks & Quarks. On this week's show, how some of the ocean's biggest and most powerful predators may be at risk of overheating in a warming world.
Nicholas Payne· Guest0:47
As fish get big, and particularly these warm-bodied ones, it's actually increasingly hard for them to lose their heat from their body.
Bob McDonald· Host0:56
And a surprising discovery by sea cucumber researchers that left them scratching their heads.
Sarah Jobson· Guest1:01
We could tell that these tissues were not dead. They're not decaying. They're continuing to reform, restructure, and persist. But are they actually alive?
Bob McDonald· Host1:11
Plus, the Quirks & Quarks origin story, an ancient parrot trade route, and how dream engineering can solve problems. All this today on Quirks & Quarks.
Unknown speaker1:22
[water flowing] [shark swimming]