Why were most peppered moths dark in the 1959 era but light in the 2000s?

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

what is the actual question though?

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.