Species often experience a genetic bottleneck that diminishes genetic variation after speciation or introduction into a new area. Though bottlenecks in population size always reduce fitness and evolutionary potential, introduced ...
Plants & Animals
Mar 19, 2019
0
75
In the animal kingdom, birds band together to ward off predators, and honeybees work collectively to benefit the entire hive. Animals of the human persuasion can act cooperatively too, at times, though this behavior is not ...
General Physics
Mar 4, 2019
0
36
A team of researchers with the International Institute for Applied Systems Analysis has found a connection between fertility rates in many African countries and access to education for girls living in those countries. In ...
Researchers at Linköping University in Sweden call into question an influential theory of the self-reinforcing dynamics of urban growth. Their research, published in Science Advances, shows that big cities feed on their ...
Social Sciences
Jan 30, 2019
0
58
The critically endangered Grauer's gorilla has recently lost genetic diversity and has experienced an increase in harmful mutations. These conclusions were reached by an international team of researchers who sequenced eleven ...
Plants & Animals
Dec 27, 2018
0
139
Over the last 2000 years Christianity has grown from a tiny religious sect to the largest family of religions in the world. How did Christianity become so successful? Did Christianity spread through grass-roots movements ...
Social Sciences
Jul 31, 2018
6
77
Nucleic acid sequencing methods, which determine the order of nucleotides in DNA fragments, are rapidly progressing. These processes yield large quantities of sequence data—some of which is dynamic—that helps researchers ...
Mathematics
Dec 28, 2017
0
345
The Sumatran rhinoceros (Dicerorhinus sumatrensis) is one of the most threatened mammals on earth. By 2011, only about 200 of the rhinos were thought to remain living in the wild. Now, an international team of researchers ...
Plants & Animals
Dec 14, 2017
0
165
Anthropologists have debated for decades whether humans living in tribal communities thousands of years ago were more or less violent than societies today. Researchers at the University of Notre Dame wonder if the question ...
Social Sciences
Dec 11, 2017
0
305
Something odd happened in the transition from the Middle to the Upper Paleolithic, around 50,000 years ago. Modern humans and their immediate ancestors had been using tools for a few million years prior, but the repertoire ...
Archaeology
May 3, 2017
3
58
