Before air conditioning was invented, white cotton slipcovers were put on furniture to keep the air cool.

It takes the Hubble telescope about 97 minutes to complete an orbit of the Earth. On average, the Hubble uses the equivilent amount of energy as 30 household light bulbs to complete an orbit.

The expression "Tying the Knot" comes from an old Roman custom where the brides clothes were tied up all in knots and the groom was supposed to untie the knots.

AMAZING FACTS