Mole-feathered mouse

According to scientist Liana Maree, the cause of this problem is the lack of sexual competition in the community of hairless mice.

Mole rat hair

Liana Maree, a scientist at Western Cape University (Bellille, South Africa) discovered that only about 7% of the spermatozoa 's sperm are able to move.

Even these sperms only move at 35 micrometers per second - the slowest of all mammals in the world.

Mole rats are also the only mammal that hosts communities like insects. There, a female is chosen as the queen and only she is responsible for reproducing and maintaining the race. The queen mole will also choose only one male to mate. This female head has the ability to inhibit reproduction with all other males to encourage cooperation rather than competition.

According to Professor Matthew Gage of the University of East Anglia (Norwich, UK), in animals, competition in mating is very important in the evolution of sperm form and function.