Evolution in action

[zebo-the-fat]

One example of animals evolving to suit changed conditions is elephants. 100 years ago their tusks were much longer than modern elephants, due to ivory poaching/hunting etc. short tusked elephants have less value to the hunters and so are more likely to live long enough to breed, the offspring are likely to have shorter tusks as well. Maybe in another 100 years they will just have small stumps instead.