The world population 60 years ago was just over 2 billion and it's now more than 6 billion. This huge increase - an explosion really - has probably done more harm to the environment than anything else.

Wildlife of the world is disappearing, not because of a malicious and deliberate policy of slaughter and extermination, but simply because of a general and widespread ignorance and neglect.

I don't know how they're going to integrate in places like Glasgow and Sheffield.

If I were reincarnated I would wish to be returned to Earth as a killer virus to lower human population levels.

Dontopedalogy is the science of opening your mouth and putting your foot in it, which I've practised for many years.

They're a damn nuisance - I've got one in my bathroom and every time I run my bath the steam sets it off.

They're not mating are they?