A team of researchers studying the Ngogo community of wild chimpanzees in western Uganda's Kibale National Park for two decades has published a report in Science showing that females in this population can experience menopause ...
Plants & Animals
Oct 26, 2023
0
162
If you are in a special relationship with another person, thank grandma - not just yours, but all grandmothers since humans evolved.
Social Sciences
Sep 7, 2015
10
937
Mammalian sperm cannot fertilize an egg from the get-go. It's an ability acquired only after insemination, during passage through the female reproductive tract, and requires two consecutive, time-sensitive processes to provide ...
Cell & Microbiology
Aug 20, 2021
0
415
Mosquitoes are one of humanity's greatest nemeses, estimated to spread infections to nearly 700 million people per year and cause more than one million deaths.
Biotechnology
May 24, 2021
2
26
Female promiscuity—something that occurs in a majority of species, including humans—results in the ejaculates from two or more males overlapping within her reproductive tract. When this happens, sperm compete for fertilization ...
Evolution
Sep 26, 2013
3
0
So-called 'selfish genes' may make females more promiscuous and also lower male fertility.
Plants & Animals
Feb 1, 2013
0
0
Fears that sex-linked chromosomes, such as the male Y chromosome, are doomed to extinction have been refuted in a new genetic study which examines the sex chromosomes of chickens.
Biotechnology
May 8, 2012
2
0
A team of New York University biologists has uncovered a previously unknown role for a set of cells within the female reproductive tract of fruit flies that affects the functioning of sperm and hence fertility. Their discovery, ...
Plants & Animals
Nov 8, 2011
0
0
The fierce battles of rutting stags may be the most famous symbols of males competing over females in the animal kingdom. But it turns out the stags don't have things all their own way.
Plants & Animals
Oct 19, 2011
0
0
Hormonal contraceptives change the ways captive ring-tailed lemurs relate to one another both socially and sexually, according to a Duke University study that combined analyses of hormones, genes, scent chemicals and behavior.
Plants & Animals
Jul 27, 2010
0
0
