Traces of sex hormones extracted from a woolly mammoth's tusk provide the first direct evidence that adult males experienced musth, a testosterone-driven episode of heightened aggression against rival males, according to ...
Plants & Animals
May 3, 2023
0
119
Watching someone cry often evokes an emotional response—but according to a new study published Thursday, human tears themselves contain a chemical signal that reduces brain activity linked to aggression.
Other
Dec 25, 2023
0
222
Under the Tanzanian skies, some thrush nightingale males reside in close proximity to each other, a striking contrast to their territorial behavior during breeding season in temperate zones. With the end of winter, a dual ...
Plants & Animals
Aug 30, 2023
0
0
A new analysis of old data suggests that the endangered erect-crested penguin's bizarre nesting habits—rejecting the first egg they lay—is because they can't feed two chicks, and the second, larger egg has a better chance ...
Plants & Animals
Oct 12, 2022
0
248
In a study appearing this week in the journal Nature Communications, a team of researchers led by Christine Drea, professor of Evolutionary Anthropology at Duke University, shows that testosterone-fueled aggression may be ...
Plants & Animals
Dec 17, 2021
0
175
Fire can put a tropical songbird's sex life on ice.
Plants & Animals
Jun 30, 2021
0
10
Males may put a lot of effort into attracting females. Male peacocks flaunt eye-catching trains, but male bats, because they are active at night, may rely on females' sense of smell to draw them in. Three years ago, Victoria ...
Plants & Animals
Dec 16, 2020
0
46
Proper development of the fetal penis requires not just testosterone from the testes, but a second hormone produced by other tissues, including the placenta, according to a new study publishing February 14 in the open-access ...
Plants & Animals
Feb 14, 2019
4
427
Men's testosterone levels are largely determined by their environment during childhood, according to new research.
Evolution
Jun 25, 2018
3
1314
Footballers in flashy cars, City workers in Armani suits, reality TV celebrities sipping expensive champagne while sitting in hot tubs: what drives people to purchase luxury goods? New research suggests that it may be a sense ...
Social Sciences
Sep 19, 2017
0
9
