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Are Ultramarathoners Just Built Different?

Ultramarathoners can run with what seems like superhuman stamina. But are their bodies much different than the rest of ours?

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Most Recent Broadcast

January 2, 2026

A look back at the biggest science stories of 2025, and a few you may have missed. Plus, over the past year, most of your body has replaced itself cell by cell. What can we learn from other animals’ dramatic feats of regeneration? And, ultramarathoners can run with what seems like superhuman stamina. But are their bodies much different than the rest of ours?

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Segment

16:05

How To Milk A Tick

Compounds in tick saliva can reveal to how these parasites can create anesthetics and anticoagulants to breakdown human and animal defenses.

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