Buried Coins Key to Roman Population Mystery?
(PhysOrg.com) -- The first century BC in Italy was culturally a brilliant age, unequaled by any other period in Roman history. It was a time of Cicero, Caesar, Vergil, Horace and many other major literary ...
Study finds human population expanded during late Stone Age
Genetic evidence is revealing that human populations began to expand in size in Africa during the Late Stone Age approximately 40,000 years ago. A research team led by Michael F. Hammer (Arizona Research Laboratory's Division ...
New analysis shows 'hobbits' couldn't hustle
A detailed analysis of the feet of Homo floresiensis—the miniature hominins who lived on a remote island in eastern Indonesia until 18,000 years ago -- may help settle a question hotly debated among paleontologists: how si ...
There was a decline of male diversity when humans took to agriculture
When people abandoned a hunter-gatherer lifestyle and became agriculturalists, initially some 10,000 years ago, they gave up a lot of things.
Researchers take new approach to determine historical population fluctuations
Honeybees show tipping points
Parasites, lack of food, cold snaps, pesticides, and poor management all can stress honeybee colonies, making it difficult to pin their collapse on a single source. However, in controlled field tests, honeybee ...
Climate change causes high, but predictable, extinction risks
Judging the effects of climate change on extinction may be easier than previously thought, according to a paper published today in the journal Nature Climate Change.
A mathematical framework for understanding cities: Part social reactor, part network
Cities have long been likened to organisms, ant colonies, and river networks. But these and other analogies fail to capture the essence of how cities really function.
Research shows male guppies reproduce even after death
Performing experiments in a river in Trinidad, a team of evolutionary biologists has found that male guppies continue to reproduce for at least ten months after they die, living on as stored sperm in females, ...
Cheating favors extinction
Cooperative behaviour is widely observed in nature, but there remains the possibility that so-called 'cheaters' can exploit the system, taking without giving, with uncertain consequences for the social unit ...
Original Australians numbered 1,000-3,000, study finds
Australia was first settled by between 1,000 and 3,000 humans around 50,000 years ago, but the population crashed during the Ice Age before recovering to a peak of some 1.2 million people around five centuries ...
Environmental change triggers rapid evolution
A University of Leeds-led study, published in the journal Ecology Letters, overturns the common assumption that evolution only occurs gradually over hundreds or thousands of years.
Scientists peek into giant squid's gene pool
Scientists announced they had peeked into the DNA of the giant squid, seeking to demystify a deep-sea creature that has haunted sailors' dreams for centuries.
Reducing numbers of one carnivore species indirectly leads to extinction of others
Previous studies have shown that carnivores can have indirect positive effects on each other, which means that when one species is lost, others could soon follow. A team from the University of Exeter and the University of ...