Uncategorized

  1. Astronomy

    Energy-Saving Space Engines: Black holes can be green

    Some seemingly quiet black holes are actually efficient engines that emit jets of high-energy particles.

    By Carolyn Gramling

  2. 19673

    This article refers repeatedly to black holes “swallowing matter and spitting out [or sending out] energy.” What really “spits out” or “sends out” anything is not the black hole itself, but the disk of gas that’s in the process of being mostly sucked irreversibly into the black hole. Bruce MoomawCameron Park, Calif.

    By Science News
  3. Earth

    Brain Delay: Air pollutants linked to slow childhood mental development

    Pollutants spewing from vehicles and power plants may be harmful to fetal brains.

    By Ben Harder

  4. Nixing Malaria: DNA segment provides parasite resistance

    A section of the mosquito genome appears to give the insects a natural resistance to malaria.