- a blue whale can weigh as much as 30 elephants and as long as 3 large tour buses
- the greyhound is the fastest dog and can reach speeds of up to 72kph (45mph)
- the fastest fish in the sea is the swordfish and can reach up to speeds of 108kph (68mph, 59knots)
- female condors lays a single egg once every 2 years
hippopotamuses have skin 3.8cm (1.5in) thick
an arrow frog has enough poison to kill over 2,200 people
whales have the slowest metabolism of all animals