https://ift.tt/2wwdHAe How Teeth Became Tusks, and Tusks Became Liabilities Elephants, Ivory, Poaching (Wildlife), Teeth and Dentistry 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. NATALIE ANGIER https://ift.tt/2Mm0E7n September 11, 2018 at 05:30AM

By NATALIE ANGIER from NYT Science https://ift.tt/2O5pCcA