hmmm, what are all these grey moths doing out here?
Let me tell you a bit about these moths.
They are peppered moths and have been around for hundres of years.
Wow, tell me a bit more about them.
Ask me something you would like to know about them.
How come most of them are grey and only a few are black?
What a great observation! Well, the reason for there being majority grey moths is because most trees were grey and due to natural selection occuring the grey moths survived longer than the black as they are able to camofladge with the trees.
But this all very soon changed.
Yes, I see there are more black ones now! Tell me more, what happened?
When the industrial revolution occured there was much polution produced causing changes in the environemnt and this affected the peppered moth.