New research finds that even though hens aren't terribly picky about their mates, they are picky about whose sperm makes it to the egg.
Plants & Animals
Aug 25, 2011
2
0
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
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
Humans and some whales are the only known species in which females live long after they stop being able to reproduce.
Plants & Animals
Oct 29, 2023
1
24
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
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
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 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
(PhysOrg.com) -- University of Florida researchers, in collaboration with the U.S. Department of Agriculture, report that a single dose of an immunocontraceptive vaccine controls fertility over multiple years in adult female ...
Plants & Animals
Sep 30, 2011
0
0
