Young male gorillas usually leave their family group when they are about 11 years old and have their own family group by the age of 15 years old. Young female gorillas join a new group at about 8 years old.

The chemical name for caffeine is 1,3,7-trimethylzantihine.

There are 21 "secret" highways that are part of the Interstate Highway System. They are not identified as such by road signs.

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