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.

On average redheads have 90,000 hairs. People with black hair have about 110,000 hairs.

A tankless water heater uses half the energy of a standard model.

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