• 生物进化史上的“大爆炸”时期

    13-09-13 A new study led by Adelaide researchers has estimated, for the first time, the rates of evolution during the Cambrian explosion when most modern animal groups appeared between 540 and 520 million years ago. The findings, published online today in th...

  • 圆盘状星系的成因

    13-09-12 It happens to all kinds of flat, disk galaxies -- whether they're big, little, isolated or crowded in a cluster. They all grow out of their irregular, clumped appearance and their older stars take on the same smooth look, predictably fading from a b...

  • 科学家在陨石中发现有机分子

    13-09-11 An important discovery has been made concerning the possible inventory of molecules available to the early Earth. Scientists led by Sandra Pizzarello, a research professor in ASU's Department of Chemistry and Biochemistry, found that the Sutter's Mi...

  • 蝙蝠与海豚的基因有相似处

    13-09-05 The evolution of similar traits in different species, a process known as convergent(会聚性的) evolution, is widespread not only at the physical level, but also at the genetic level, according to new research led by scientists at Queen Mary Univers...

  • 进化会惩罚自私与卑鄙

    13-08-05 Two Michigan State University evolutionary biologists offer new evidence that evolution doesn't favor the selfish, disproving a theory popularized in 2012. We found evolution will punish you if you're selfish and mean, said lead author Christoph Ada...

  • 物种进化是可预测的

    13-07-22 If you could hit the reset button on evolution and start over, would essentially the same species appear? Yes, according to a study of Caribbean lizards by researchers at the University of California, Davis, Harvard University and the University of...

  • 进化的角度研究人类基因组

    13-07-13 By comparing the human genome to the genomes of 34 other mammals, Australian scientists have described an unexpectedly high proportion of functional elements conserved through evolution. Less than 1.5% of the human genome is devoted to conventional...

  • 女性更年期归因于 男人

    13-06-16 After decades of laboring under other theories that never seemed to add up, a team led by biologist Rama Singh has concluded that what causes menopause(更年期) in women is men. Singh, an evolutionary geneticist, backed by computer models developed...

  • 进化论在自然界如何体现

    13-06-16 Many students have difficulty understanding and explaining how evolution operates. In search of better ways to teach the subject, researchers at Michigan State University developed complete evolutionary case studies spanning the gamut(整个范围) fr...

  • 大型爬行动物曾与哺乳动物共生于地球

    13-06-06 Some 40 million years before rock singer Jim Morrison's lyrics earned him the moniker(绰号,名字) the Lizard King, an actual king lizard roamed the hot tropical forests of Southeast Asia, competing with mammals for food and other resources. A team...