Paper can only be recycled 3 times, because the fibers get shorter and weaker each time the paper is recycled.
Flies lend their tiny ears to hearing study
Flies lend their tiny ears to hearing study Most flies can't hear at all, but one species of
parasitic fly has some of the most acute hearing in nature, as good
as cats and owls. These flies lay their eggs on crickets, and
locate the crickets by following their singing. The extremely small
size of the flies eardrums means that they are extremely efficient
and may hold clues for improved hearing aids for people. APRIL 5, 2001
Cool Articles
