Despite their fearsome fangs, male sabertoothed cats may have been less aggressive than many of their feline cousins, says a new study of male-female size differences in extinct big cats.
Plants & Animals
Nov 5, 2009
0
0
Lucy and other members of the early hominid species Australopithecus afarensis probably were similar to humans in the size difference between males and females, according to researchers from Penn State and Kent State University.
Archaeology
Apr 28, 2015
0
46
Amphisbaenians are strange creatures. Like worms with vertebrae, scales, a large central tooth and sometimes small forearms, these reptiles live underground, burrowing tunnels and preying on just about anything they encounter, ...
Plants & Animals
Feb 12, 2024
1
24
Which females do male lizards find to be the sexiest? Tracy Langkilde, an associate professor of biology at Penn State University, and Lindsey Swierk, a graduate student in Langkilde's lab, tackle this question by examining ...
Plants & Animals
Nov 5, 2013
1
0
Male lions typically have manes. Male peacocks have six-foot-long tail feathers. Female eagles and hawks can be about 30% bigger than males. But if you only had these animals' fossils to go off of, it would be hard to confidently ...
Archaeology
Aug 27, 2020
0
363
In the bird world, male and female blue tits are hard to distinguish for the human observer. However, in the UV-range, visible to birds, the male is much more colourful. A closer look at the monogamous mating system of these ...
Evolution
Apr 3, 2013
0
0
A new species of freshwater fish in the family Characidae, called Hyphessobrycon myrmex, exhibits an intriguing sexual dichromatism: Adult males are a deep reddish-orange, while females and juveniles are pale yellow. The ...
Plants & Animals
Dec 13, 2017
0
10
A paleontologist at the Canadian Museum of Nature is countering decades of studies that assert that some dinosaurs can be identified as male or female based on the shapes and sizes of their bones.
Archaeology
Mar 29, 2017
0
16
The expression of a gene involved in female birds' color vision is linked to the evolution of colorful plumage in males, reports a new study from the University of Chicago. The findings, published Nov. 26 in the Proceedings ...
Plants & Animals
Nov 25, 2014
0
0
Bee researchers at Heinrich Heine University Düsseldorf (HHU) headed by Professor Dr. Martin Beye have identified a new gene in honeybees, which is responsible for the dimorphic eye differentiation between males and females ...
Evolution
Feb 13, 2023
0
135
