Shark extinction event, caffeine can’t keep you functional, the pachyderm’s proboscis, prey eat a predator, and learning about land use from Indigenous science

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Quirks and Quarks Complete Show from CBC Radio

Health & Fitness

Sharks were almost wiped out in a mystery extinction 19 million years ago; Caffeine fail - New study shows it can keep you awake, but can’t keep you functional; How an elephant’s trunk acts as a “muscular multitool”; Normally herbivorous sea urchins turn the tables on a predatory sun star; How Indigenous science could help us with our sustainability and diversity crisis.