Today's modern cities, from Denver to Dubai, could learn a thing or two from the ancient Pueblo communities that once stretched across the southwestern United States. For starters, the more people live together, the better the living standards. ...
Astronomers have identified periodic gamma-ray emissions from 11 active galaxies, paving the way for future studies of unconventional galaxies that might harbor two supermassive black holes at their centers. ...
As nuclear fusion engines, most stars live placid lives for hundreds of millions to billions of years. But near the end of their lives they can turn into crazy whirligigs, puffing off shells and jets of hot gas. Hubble has ...
Cooperative-worker dog breeds do not appear to respond more negatively to unfair outcomes than do independent-worker breeds, according to a new study. Although the sample size was small, the results do not support the hypothesis that inequity aversion and cooperation ...
The lives of honeybees are shortened -- with evidence of physiological stress -- when they are exposed to the suggested application rates of two commercially available and widely used pesticides. ...
While humans have three color cones in the retina sensitive to red, green and blue light, birds have a fourth color cone that can detect ultraviolet light. A research team trained wild hummingbirds to perform a series of experiments that ...
A new interdisciplinary study reports on 20 newly sequenced ancient genomes from sub-Saharan Africa, including the first genomes from the Democratic Republic of the Congo, Botswana, and Uganda. The study documents the coexistence, movements, interactions and admixture of diverse human ...
The origins of human innovation have traditionally been sought in the grasslands and coasts of Africa or the temperate environments of Europe. More extreme environments, such as the tropical rainforests of Asia, have been largely overlooked, despite their deep history ...
If we act quickly and decisively, there is a slim window in which we can still conserve roughly half of Earth's land in a relatively intact state, a new study suggests. ...
Researchers have created a new model to evaluate the long-term economic benefits of top predator recovery, using sea otter recovery along the west coast of Canada as a case study. ...