Male koalas mark their territory by rubbing their chests on a tree. Male koalas have a dark scent gland in the middle of their chest.

The actor who played the T-1000 in Terminator 2 (Robert Patrick) and the lead singer of Filter are brothers.

The Hoover Dam was built to last 2,000 years. Its concrete will not be fully cured for another 500 years.

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