Over 65 million years North American mammal evolution has tracked with climate change
Climate changes profoundly influenced the rise and fall of six distinct, successive waves of mammal species diversity in North America over the last 65 million years, shows a novel statistical analysis led ...
Dec 26, 2011 |
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Discovery of a 160-million-year-old fossil represents a new milestone in early mammal evolution
(PhysOrg.com) -- A remarkably well-preserved fossil discovered in northeast China provides new information about the earliest ancestors of most of today's mammal species—the placental mammals. According ...
Other Sciences / Archaeology & Fossils
Aug 24, 2011 |
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Harvesting of small fish species should be cut: study
(PhysOrg.com) -- New research on the fishing of small fish species near the bottom of their food chains suggests harvesting at levels previously thought to be sustainable could have devastating effects on ...
Jul 22, 2011 |
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Has the Earth's sixth mass extinction already arrived?
With the steep decline in populations of many animal species, from frogs and fish to tigers, some scientists have warned that Earth is on the brink of a mass extinction like those that occurred only five times ...
Mar 02, 2011 |
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Delayed legacy of invasive species
(PhysOrg.com) -- A team of researchers in Europe has urged governments to introduce tougher controls of all international trade that could result in the introduction of non-native species. They say the full ...
Dec 22, 2010 |
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Hormone study finds monkeys in long-term relationship look strangely human
(PhysOrg.com) -- Monkeys in enduring relationships show a surprising correspondence in their levels of oxytocin, a key behavioral hormone, according to research published online June 28 in the journal Hormones and Behavior.
Jul 13, 2010 |
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Researcher compiles evidence in support of Darwin's theory of sexual selection
In 1871, Charles Darwin sparked debate that continues today when he proposed that human sex differences evolved based on sexual selection. Sexual selection is Darwin's theory that certain physical, mental or psychological ...
Apr 13, 2010 |
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Naming evolution's winners and losers
(PhysOrg.com) -- Mammals and many species of birds and fish are among evolution's "winners," while crocodiles, alligators and a reptile cousin of snakes known as the tuatara are among the losers, according ...
Jul 29, 2009 |
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Trees evolved camouflage defense against long extinct predator: First evidence of camouflage defense in plants
(PhysOrg.com) -- Many animal species such as snakes, insects and fish have evolved camouflage defences to deter attack from their predators. However research published in New Phytologist has discovered that t ...
Jul 22, 2009 |
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Mosquito evolution spells trouble for Galapagos wildlife
The Galapagos giant tortoise and other iconic wildlife are facing a new threat from disease, as some of the islands' mosquitoes develop a taste for reptile blood.
Jun 01, 2009 |
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Scientists discover ultrasonic communication among frogs
(PhysOrg.com) -- UCLA scientists report for the first time on the only known frog species that can communicate using purely ultrasonic calls, whose frequencies are too high to be heard by humans. Known as ...
May 11, 2009 |
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Researchers help save rare venomous mammal from extinction
Scientists at the University of Bath are working with the Durrell Wildlife Conservation Trust to study an endangered large shrew-like mammal that kills its prey with a venomous bite.
Mar 31, 2009 |
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Nearly one-tenth of hemisphere's mammals unlikely to outrun climate change: study
A safe haven could be out of reach for 9 percent of the Western Hemisphere's mammals, and as much as 40 percent in certain regions, because the animals just won't move swiftly enough to outpace climate change. ...
May 14, 2012 |
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Research shows rats have best bite of rodent world
Scientists at the University of Liverpool have found that mice and rats have evolved to gnaw with their front teeth and chew with their back teeth more successfully than rodents that 'specialise' in one or ...
Apr 27, 2012 |
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Egg-laying beginning of the end for dinosaurs
Their reproductive strategy spelled the beginning of the end: The fact that dinosaurs laid eggs put them at a considerable disadvantage compared to viviparous mammals. Together with colleagues from the Zoological ...
Other Sciences / Archaeology & Fossils
Apr 17, 2012 |
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