Trăm voi không được một cặp ngà:
Ivory poaching has led to evolution of tuskless elephants
https://www.theguardian.com/environm...lephants-study
- ngà: từ chữ NHA (牙) nghĩa là răngQuote:
Researchers looked at why female elephants in Gorongosa national park in Mozambique were frequently born without tusks, and found that the animals were in effect genetically engineered by mass poaching for ivory.
Elephants with tusks were highly likely to be hunted during the Mozambican civil war from 1977 to 1992, when 90% of the elephant population was slaughtered by armed forces on both sides to produce ivory that was sold to finance the conflict. Those without tusks were left alone, leading to an increased likelihood they would breed and pass on the tuskless trait to their offspring.
(còn tiếp)

