That only female ducks can quack. [Really?!]
Like finger prints everyone’s tongue prints are different.
An office desk is likely to harbour 400 times more bacteria than a toilet. [I assume that means 400 times more types of bacterium. ]
Starfish can turn their stomachs inside out. [Yes I did know that.]
Most spiders have eight eyes as well as eight legs.
There are more than 2700 languages in the world. [There’s almost that many versions of English so far as I can see!].