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.

Octopus and squid are thought to be the most intelligent of all invertebrates.

In the U.S., there are about 15,000 vacuum cleaner-related accidents each year.

A M A Z I N G   F A C T S