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Your search has returned 524 articles:
  • News

    Bears that eat ‘junk food’ may hibernate less and age faster

    Mama bears may need to raise their snouts and join the chorus protesting junk food.

    The more sugary, highly processed foods that 30 female black bears scrounged from humans, the less time the bears were likely to spend hibernating, researchers found. In turn, bears that hibernated less tended to score worse on a test for aging at the cellular level, wildlife ecologist Rebecca Kirby and...

    03/04/2019 - 06:00 Animals, Physiology, Cells
  • Letters to the Editor

    Readers ponder mitochondria, Neandertal diets, deep sea corals and more

    Dad’s contribution

    Scientists have long thought that children inherit mitochondria — tiny energy factories found in cells — from only their mothers. But data from three unrelated families suggest that in rare cases children can also inherit mitochondria from their fathers, Tina Hesman Saey reported in “Dads, not just moms, can pass along mitochondrial DNA” (SN: 1/19/19, p. 8).

    ...

    02/26/2019 - 06:00 Cells, Anthropology, Oceans
  • Science Visualized

    How light-farming chloroplasts morph into defensive warriors

    Chloroplasts may seem like docile farmers of light. But inside these microscopic plant and algal cell structures lurks the spirit of a warrior.

    When a pathogen attacks a plant, chloroplasts stop making food from sunlight and rush to the site of infection to help fend off the invader. Now, researchers have identified the protein that mobilizes these organelles into a defensive army.

    ...
    01/28/2019 - 08:00 Plants, Cells, Immune Science
  • News

    Mice lack stem cells in the heart needed for self-repair

    There’s some bad news for people who have suffered heart attacks: Healing may not come from within.

    Researchers have debated for years whether hearts have their own stem cells. If they existed, those cells could produce new heart muscle cells and might help the organ repair itself after injury. Now that debate may finally be over. After following the fate of dividing cells in the hearts...

    12/19/2018 - 10:53 Cells
  • News

    Tumor ‘organoids’ may speed cancer treatment

    SAN DIEGO — Collecting cancer cells from patients and growing them into 3-D mini tumors could make it possible to quickly screen large numbers of potential drugs for ultra-rare cancers. Preliminary success with a new high-speed, high-volume approach is already guiding treatment decisions for some patients with recurring hard-to-treat cancers.

    “Believe it or not, for some rare cancers...

    12/17/2018 - 12:00 Cancer, Biomedicine, Cells
  • News in Brief

    Biologists are one step closer to creating snake venom in the lab

    SAN DIEGO — Labs growing replicas of snakes’ venom glands may one day replace snake farms.

    Researchers in the Netherlands have succeeded in growing mimics of venom-producing glands from multiple species of snakes. Stem cell biologist Hans Clevers of the Hubrecht Institute in Utrecht, the Netherlands, reported the creation of these organoids on December 10 at a joint meeting of the...

    12/11/2018 - 14:08 Cells