- Sep 4, 2018
That's an old one!Evolution is occuring all the time when evolutionary pressures are there.
One example is Elephants evolving to have no tusks in response to poaching. At some point a gene mutation resulted in an Elephant been born without tusks. With poaching eliminating the competition that elephant spread that mutation such that there has been in a relatively small period of time (in evolutionary terms) a clearly identifiable evolution in the Elephant population having smaller / no tusks.
Elephants are now being born without tusks because of poaching
Back in 19th century Britain it was noticed that White Moths became rarer and Black ones proliferated
Why - the trees on which the settled were turning Black with soot from factory chimneys...