Is anyone else disturbed by the following description: Scientists are reporting development of a new form of buckypaper, which eliminates a major drawback of these sheets of carbon nanotubes — 50,000 times thinner than a human hair, 10 times lighter than steel, but up to 250 times stronger . . .

Tests see no evidence to confirm a bold 2010 claim that some microbes can incorporate the normally toxic element into their cellular machinery.

As invasive snakes expand territory, some mammal populations drop by more than 90 percent within a decade.

More than 1,800 high school students entered the 2012 competition.