Tortoises in the Mojave Desert store up to 1/3 of their body weight in urine. When they need water, the water in their urine flows back into their bodies while the waste remains and expels.

The largest volcano known is on Mars: Olympus Mons, 370 miles wide and 79,000 feet high, is almost three times higher than Mount Everest.

Barbie's full name is Barbara Millicent Roberts.

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