How Teeth Became Tusks, and Tusks Became Liabilities

Humans, mice, narwhals — most mammals rely on ancient genes to produce teeth and tusks. But the tuskless elephants of Africa show that nature can quickly alter the code.
The New York Times
By NATALIE ANGIER from NYT Science https://ift.tt/2O5pCcA
September 10, 2018 at 02:00PM