All animals need sleep. When humans or animals don't get enough, it can lead to trouble paying attention, irritability, and other ill effects. And yet, researchers reporting in the journal Current Biology have made the surprising ...
Plants & Animals
Jan 25, 2024
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8
A new study has found the distribution of females in 33 species of Australian rodents affects the evolution of testes size of males in these social species.
Plants & Animals
May 4, 2022
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87
It turns out age is no barrier when it comes to reproducing—well, at least for one type of fish.
Plants & Animals
Jul 30, 2021
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7
Males that face tougher competition for females risk having offspring with a greater number of harmful mutations in their genome than males without rivals. Researchers at Uppsala University have discovered this correlation ...
Plants & Animals
Mar 16, 2020
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228
New research led by The University of Western Australia has shown that the social conditions that a male experiences while growing up can influence the amount of X and Y chromosome sperm that he produces as an adult.
Evolution
Jul 1, 2019
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1
Think back to health class and picture a sperm. It's got a smooth rounded head, with a long skinny tail at the end, right? As it turns out, the sperm from different species of animals have different shapes—and, as a new ...
Plants & Animals
Dec 4, 2018
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46
The delicately mannered dance between discerning eggs and vying sperm is more complicated than scientists once believed, and it may hold secrets about the evolution of new species.
Plants & Animals
Nov 8, 2017
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147
After mating for the first time, most females of an Australian jumping spider are unreceptive to courtship by other males, and this sexual inhibition is immediate and often lasts for the rest of their lives, according to ...
Plants & Animals
Oct 18, 2017
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86
The size and swimming speed of sperm are controlled by a single supergene in birds, according to a new study by the University of Sheffield.
Evolution
Jul 18, 2017
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70
In zebra finches, sperm velocity and morphology and hence reproductive success strongly depend on a specific mutation (an inversion) on one of the sex chromosomes, called Z. This was discovered by scientists of the Max Planck ...
Plants & Animals
Jul 17, 2017
0
135
