Uncategorized

  1. 19885

    Astronomer Masanori Iye of the National Observatory of Japan blames the blurry appearance of meteor trails at about 100 kilometers altitude on the fact that they were photographed with telescopes focused at infinity. But optics teaches that any object much farther away than the focal length of the telescope is essentially “at infinity.” Wouldn’t a […]

    By Science News
  2. Plants

    Water-saving grain

    Rice with an added gene needs less water and can survive drought.

    By Patrick Barry
  3. Animals

    Honeybee mobs smother big hornets

    Honeybees gang up on an attacking hornet, killing it by blocking its breathing.

    By Susan Milius
  4. Health & Medicine

    Exhaust fumes might threaten people’s hearts

    Nanoparticles in diesel fumes thwart proteins that dissolve blood clots, perhaps increasing the risk of heart attacks.