A gale force wind is a wind blowing between 39 to 26 miles per hour.
Left-handedness is extremely common in twins. It is unusual, however, for both to be left-handed.
There are close to 4,000 known species of frogs, including toads.
The biggest frog is the appropriately named Goliath frog (Conraua goliath) of Cameroon. They reach nearly 30cm (a foot) and weigh as much as 3.3 kilograms.
The smallest frog is the Gold frog (Psyllophryne Didactyla) of Brazil. They grow to only 9.8 mm (3/8 inch).