Uncategorized

  1. Health & Medicine

    Rackets and Radicals: Noise may cause gene damage in heart

    Exposure to loud, continuous sound can scatter free radicals within heart tissue and cause injury to cells' DNA even after the din subsides, new animal research suggests.

    By Ben Harder
  2. Chemistry

    Shark Sense: Gel helps animals detect thermal fluctuations

    New studies suggest that clear jelly under sharks' skin can enable the animals to detect minute changes in seawater temperature—potentially leading them to prey.

    By Jessica Gorman
  3. Math

    Sliding-Coin Puzzles

    Geometric arrangements of coins can serve as the basis for all sorts of puzzles. One popular variant involves going from one configuration to another by sliding coins, subject to given constraints, and doing so in the fewest possible moves.