Search Content

E.g., 09/02/2015
E.g., 09/02/2015
Your search has returned 952 images:
  • guppies!
  • river dolphin fossil skull and jaw
  • jellyfish
Your search has returned 3817 articles:
  • News

    Unhelpful adaptations can speed up evolution

    When organisms enter a new environment, they’re bound to make some missteps. A new study suggests those initial flubs may speed up evolution.

    Trinidadian guppies transplanted from predator-infested waters to streams devoid of predators responded by changing activity of some genes in the brain. Although some changes were helpful, most were disadvantageous. But genes that got off on the...

    09/02/2015 - 13:13 Evolution
  • Science Ticker

    New dolphin fossil makes a splash

    Six million years ago, a relative of modern river dolphins once frolicked along Panama's Carribbean shores, researchers report September 1 in PeerJ. Unearthed in 2011, the fossilized skull, teeth and jaw bones belong to a novel dolphin species (Isthminia panamensis). 

    Researchers originally rescued the fragile specimen from...

    09/02/2015 - 06:00 Paleontology, Animals, Evolution
  • Wild Things

    Some jellyfish sting deeper than others

    Jellyfish are best avoided, in my opinion. Though beautiful to watch in an aquarium, jellies are equipped with stingers that can be harmless — or cause pain or even kill. And it can be difficult to tell the difference without some research — which you don’t really have time for when one is heading...

    09/01/2015 - 12:20 Animals
  • News

    Volcanic activity convicted in Permian extinction

    The biggest catastrophe in the history of life on Earth resulted from one of the most titanic volcanic outpourings on record, new research concludes.

    At the close of the Permian period around 252 million years ago, more than 90 percent of all marine species and roughly 75 percent of all land species vanished. New high-precision analysis of ancient lavas determines this extinction...

    08/28/2015 - 14:00 Earth, Paleontology
  • Wild Things

    Coral competitor becomes ally in fight against starfish

    Coral and algae don’t get along. On reefs, algae compete with coral, reducing coral growth and survival. Scientists suspect that the algae may also promote harmful bacteria or coral-eating species, causing further coral damage.

    But coral have an even bigger worry: the crown-of-thorns starfish. These are large (up to about a third...

    08/28/2015 - 13:00 Animals, Ecology
  • Science Ticker

    Tropical songbirds get their growth spurt late

    Scientists have long puzzled over why tropical songbirds lay fewer eggs than their temperate-zone counterparts. A new study suggests that it may have to do with how baby birds grow.

    Thomas Martin of the University of Montana in Missoula compared nestling development in 72 songbird species from Arizona, Venezuela and Malaysia. While the Arizona birds grew quickly in the early days after...

    08/27/2015 - 14:00 Animals
  • News

    Decoy switches frogs’ mating call preference

    A trick that salesmen use to sell expensive cars may help average frogs snag mates.    

    Female túngara frogs often switch which of two mating calls they prefer upon hearing a third, unattractive mating call, researchers report in the Aug. 28 Science. This action resembles a human behavior known as the “...

    08/27/2015 - 14:00 Animals, Evolution
  • Editor's Note

    DNA architecture, novel forensics offer new clues

    It’s one thing to catalog each chemical unit of DNA that makes up the human genome. It’s another thing entirely to understand how that genetic material is folded up inside a living cell — and then decoded, manipulated and used.

    Achieving that...

    08/26/2015 - 15:35 Genetics, Chemistry, Microbes
  • Letters to the Editor

    Moon bounces, bad spider leaders and more reader feedback

    Untangling the faith debate

    In “A biologist takes aim at religion” (SN: 7/11/15, p. 27), Bruce Bower reviewed...

    08/26/2015 - 15:35 Human Evolution, Animals, Physics
  • News

    Twin pandas look forward to growth spurts

    Update: On August 26, the National Zoo reported that the smaller of the twin panda cubs born to Mei Xiang had died. Zookeepers, who had been caring for the giant panda cub by hand for two days, had been concerned about its fluctuating weight and noted that the days just after birth are a high-risk period....

    08/26/2015 - 12:43 Animals