On April 1, 1974, black smoke was seen rising from Mount Edgecumbe, a volcano in Alaska. When a Coast Guard pilot came closer to investigate, he found 70 tires burning and the words “APRIL FOOL” spray painted into the snow.

On April Fool’s day in 1976, BBC convinced many listeners that a special alignment of the planets would temporarily decrease gravity on Earth. Phone lines were flooded with callers who claimed they felt the effects.

The earliest recorded case of a man giving up smoking was on April 5, 1679, when Johan Katsu, Sheriff of Turku, Finland, wrote in his diary “I quit smoking tobacco.” He died one month later.

Wolves have only one breeding season per year – in the winter. They have their puppies in late April or early May. They have their puppies in an underground hole, or den. There are usually four to six puppies in a litter. The puppies grow up fast and are their adult size by the end of their first winter. They are grown up by the time they are two years old.