In most mammals, males disperse to a new group after reaching sexual maturity. Dispersal often entails costs and is risky. New results from spotted hyenas show that males from the same birth group and particularly twin brothers very often disperse together and choose the same group to breed.
Washington [US], November 6 (ANI): Through a recent study, scientists have explained how humans have been growing taller and reaching sexual maturity earlier over the past century.
New Delhi [India], July 6 (ANI): Four years ago, a survey conducted by Federation of Obstetrics and Gynaecologists Society of India (FOGSI) found that the age at which girls attain sexual maturity in urban India has dropped.
Washington D.C. [USA]. April 2 (ANI): Chinese researchers have warned environmental exposure to pesticides that kill mosquitoes, insects and sprayed on crops, may cause boys to reach sexual maturity early at the age of nine.