Twinkies do, in fact, have a shelf life — 25 days, to be precise, according to Hostess Foods. It only seems like the yellow sponge cake injected with vanilla cream filling lasts forever. Maybe because it's been around as long as anyone can remember.]]> Moths of the Hawaiian genus Hyposmocoma are an oddball crowd: One of the species' caterpillars attacks and eats tree snails. Now researchers have described at least a dozen different species that live underwater for several weeks at a time.]]> It may sound far-fetched, but federal regulators are studying whether sudden acceleration in Toyotas is linked to cosmic rays. Radiation from space long has affected airplanes and spacecraft, and is known for triggering errors in computer systems, but has received scant attention in the auto industry.]]> They're not as menacing as Burmese pythons, but Giant African snails are now in the same class as the large snakes — targets of the government. The invasive mollusks are considered a major plant pest and a potential public health threat. And now federal and state authorities are seeking to prevent the large, slimy, shell-toting snails from re-establishing themselves in Florida.]]>