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  • News

    Chemical tags on DNA appear to differ between gay and straight men

    BALTIMORE — Molecular tests may be able to distinguish homosexual from heterosexual men, a small study of twins suggests.

    Chemical modifications to DNA that change the activity of genes without changing the genes’ information differ between homosexual and heterosexual men, researchers from UCLA David Geffen School of Medicine have discovered. Results of the unpublished study on the link...

    10/08/2015 - 17:27 Genetics, Epigenetics
  • Science Ticker

    Widespread coral bleaching threatens world’s reefs

    Corals across the globe are experiencing widespread bleaching from high ocean temperatures, the National Oceanic and Atmospheric Administration states in its latest Coral Watch Report. Stressful conditions in the Pacific and Caribbean...

    10/08/2015 - 16:57 Oceans, Animals, Ecosystems
  • Science Ticker

    Ancient Mars had long-lasting lakes of liquid water

    Large lakes once wet the Martian landscape for thousands of years at a time, new evidence suggests.

    Last year, NASA scientists reported that Gale Crater, currently home to the Curiosity rover, was once filled with liquid water. Analyzing sediments and signs of erosion, Curiosity mission...

    10/08/2015 - 14:00 Planetary Science
  • News

    Into Africa: Ancient skeleton sheds light on reverse migration

    DNA from a man who lived about 4,500 years ago in what’s now Ethiopia has illuminated a surprisingly influential migration of Eurasians into Africa 1,500 years after his death.

    That back-to-Africa trek occurred around 3,000 years ago and left a substantial genetic imprint on populations now living throughout sub-Saharan Africa, say University of Cambridge evolutionary biologist Marcos...

    10/08/2015 - 14:00 Ancestry, Anthropology, Genetics
  • Science Ticker

    Fish have had telescoping jaws for 100 million years

    For the last 100 million years, fish have steadily refined the art of tossing their own jaws forward.

    This hunting trick, known as jaw protrusion, helps bony teleost fish — the most abundant group of fish worldwide — snag their prey. When fish first tried the trick in the Late Cretaceous, they could stretch their jaws up to 8.16 percent of their own body length. Today, fish can...

    10/08/2015 - 12:45 Animals, Evolution
  • Science Ticker

    Weight and sun exposure linked to onset of multiple sclerosis

    People with multiple sclerosis who got less sun exposure and had higher body mass as young adults developed the disease sooner than those who spent more time in the sun and were a normal weight, a new study finds.

    In a study of over 1,100 Danish people with MS — a nervous system condition that causes muscle...

    10/07/2015 - 16:20 Health, Neuroscience
  • News

    Chemistry Nobel granted for deciphering DNA repair

    Identifying the molecular repair kits that cells use to fix damaged DNA has won three scientists the 2015 Nobel Prize in chemistry. Tomas Lindahl of the Francis Crick Institute in England, Paul Modrich, a Howard Hughes Medical Institute investigator at Duke University School of Medicine, and Aziz Sancar of the University of North Carolina School of Medicine uncovered three tools for correcting...

    10/07/2015 - 15:34 Chemistry, Genetics
  • Wild Things

    How the giraffe got its long neck

    The neck of a giraffe isn’t all that different from any other mammal’s. There are seven neck vertebrae, like those of humans, but they are much bigger. (This is a different strategy than other long-necked creatures in history. Marine reptiles called plesiosaurs, for instance, had 38 to 42 vertebrae to lengthen their...

    10/07/2015 - 14:30 Animals, Evolution
  • News

    Oldest pregnant horselike fossil found

    A confluence of unlikely events led to the exquisite preservation of the oldest fossil of a primitive pregnant horse ever discovered.

    Some 48 million years ago, an equoid mare (Eurohippus messelensis) and her almost fully gestated fetus fell into an ancient lake in the area of Grube Messel near Frankfurt, Germany. The lake had just the right mix of bacteria to preserve even soft...

    10/07/2015 - 14:03 Animals, Evolution
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    10/07/2015 - 11:49