The famous pink-colored sand of bermuda's beaches is due to crushed shells of marine organisms with tests (porous shells) made of organic material hardened by calcium carbonate.

Beaches of Bermuda are lined with coral reefs, which are a place where red foraminifera are found. The foraminifera are the single-celled marine organisms classified as protists., They live in shells made of calcium carbonate with a red colour. Shells of foraminifera collect on the ocean floor and get washed to shore by the tide and that’s what makes beach looks pink on the sun. 

Most scientists would agree unequivocally that humans have greatly affected the process of evolution, from the rise of antibiotic and pesticide resistance to the largely human-caused increase in the extinction rate. Our effect on the process of evolution even extends to our own species' evolution.