It is possible to identify the sex of the giraffe from the horns on its head. Both males and females have horns but the females are smaller and covered with hair at the top. Male giraffes may have up to 3 additional horns.

The Mars Rover "Spirit" is powered by six small motors the size of "C" batteries. It has a top speed of 0.1 mph.

There are more collect calls on Father's Day than any other day of the year.

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