News articles tagged with 'evolutionary' (Page 34)
Coelacanth fossil sheds light on fin-to-limb evolution
— 1 Aug 2007 16:39 | Geology and palaeontologyA 400 million-year-old fossil of a coelacanth fin, the first finding of its kind, fills a shrinking evolutionary gap between fins and limbs. University of Chicago scientists describe…
Trilobites reveal pattern of early animal evolution on Earth
— 27 Jul 2007 00:01 | Geology and palaeontologyThe abundant diversity of characteristics within species likely helped fuel the proliferation and evolution of an odd-looking creature that emerged from an unprecedented explosion of…
Natural selection at work in dramatic comeback of male butterflies
— 12 Jul 2007 21:43 | BiologyAn international team of researchers has documented a remarkable example of natural selection in a tropical butterfly species that fought back - genetically speaking - against a highly…
Amoebae control cheating by keeping it in the family
— 5 Jul 2007 17:29 | BiologyNo one likes a cheater, even a single-celled one. New research from Rice University shows how cooperative single-celled amoebae rely on family ties to keep cheaters from undermining…
Wolves of Alaska became extinct 12.000 years ago
— 5 Jul 2007 02:32 | Geology and palaeontologyThe ancient grey wolves of Alaska became extinct some 12.000 years ago, and the wolves in Alaska today are not their descendants but a different subspecies, an international team of…
Marine worm opens new window on early cell development
— 3 Jul 2007 02:36 | BiologyUniversity of Oregon biologists studying a common ocean-dwelling worm have uncovered potentially fundamental insights into the evolutionary origin of genetic mechanisms, which when…
Fossil discovery marks earliest record of limbloss in ancient lizard
— 22 Mar 2007 20:22 | Geology and palaeontologyA University of Alberta palaeontologist has helped discover the existence of a 95 million-year-old snakelike marine animal, a finding that provides not only the earliest example of…
New mammal from Mesozoic Era discovered
— 15 Mar 2007 02:52 | Geology and palaeontologyAn international team of American and Chinese palaeontologists has discovered a new species of mammal that lived 125 million years ago during the Mesozoic Era, in what is now the Hebei…
Social tolerance allows bonobos to outperform chimpanzees on a cooperative task
— 8 Mar 2007 20:10 | BiologyIn experiments designed to deepen our understanding of how cooperative behaviour evolves, researchers have found that bonobos, a particularly sociable relative of the chimpanzee, are…
Why do birds migrate?
— 5 Mar 2007 07:00 | BiologyWhy do some birds fly thousands of miles back and forth between breeding and non-breeding areas every year whereas others never travel at all? One textbook explanation suggests either…