Baby bears are born in the winter and stay inside their dens until spring. Every time a cub finishes nursing, the mom licks its bottom to make it urinate. The mother bear then drinks the urine, which helps keep the den clean.

Birds do not sweat, as they do not have sweat glands.

A Swiss ski resort announced it would combat global warming by wrapping its mountain glaciers in aluminum foil to keep them from melting.

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