After the Yankees reversed their longtime beard ban, facial-hair experts, including ZZ Top’s Billy F. Gibbons, weighed in.

Have you tried napping with your eyes open? Chinstrap penguins have mastered the art! These sleep-deprived dads (and moms!) take thousands of 4-second naps a day to keep their chicks safe. Penguins ...

Chinstrap penguin numbers may have fallen by more than half on Antarctic island Chinstrap penguin numbers may have fallen by more than half on Antarctic island ...

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Chinstrap penguins live in the largest penguin colonies on earth. A king penguin's feathers offer a waterproof and insulating layer to keep them warm. After a day's fishing, African penguins land ...