Axolotl

The Race to Save the Axolotl

When an axolotl loses a limb, it regrows, and nary a scar remains. But this incredible creature is on the brink of extinction.
Close-up of a mans legs doing cross-country skiing in the Alps.

A Brief History of Skis

Researchers tested various ski designs dating back 4,000 years to understand how human movement on snow has evolved.