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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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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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Video

Mold Compounds Sandy’s Destruction

The Rockaways, a Queens, N.Y. neighborhood, is still recovering from Sandy. Debris from fires lingers on the streets, and buildings torn apart by the storm are crumbling on the beach. But those with restored heat and power have another concern: mold.

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