How much do you know? Check out what is true and what is false below (click the question mark to find out!) as Mr Dorsey, the best teacher in this universe, challenges you - what do you know?

Fred Gregory set the World Record by spending four and a half days swimming non-stop.
Benoit Beconte swam across the Atlantic in 1998
Some hotels in Las Vegas have gambling tables floating in their swimming pools
In the 1984 Olympics, there were no women's World Records set
The term swimming was named after Nelson Swimm who was the first man ever to make his way across a natural pool in South Africa
Freestyle, backstroke, butterfly and breaststroke are the most common types of swimming
The highest board to be dived off is situated at the Communal Pool in Habourtown, Western Australia
A team of more than a dozen swimmers is called a "nudge"
A person wearing water winds is called a "winged swimmetty" after the man who invented water wings, Alberto Etty.
Hippopotamus' can spend up to five minutes under the water without have to come up for air