The truth behind evolution is: SEX!
Until now evolution was believed to be the result of environment adaptation (and they say religions are all BELIEVES without proofs!). Jun Kitano, an evolutionary biologist at Tohoku University in Japan, and his team has discovered that it might not have been the case!
Jun discovered that the new sex chromosomes appeared in the male Japan Sea stickleback fishes changed the mating behaviors of the sticklebacks. Thus evolving into new species.
The cause of the sex chromosomes still remain a mystery.
Source: Nature
