strontium

(Newser) - That incredibly accurate atomic clock we heard about last year just upped its game. The JILA timepiece, created in a joint venture between the National Institute of Standards and Technology and the University of Colorado Boulder, received upgrades that now have it (in theory, at least) faithfully ticking away for...

(Newser) - The fallout from Japan's Fukushima nuclear plant disaster continues . The latest: Tests found that groundwater there contained 30 times the legal level of the radioactive substance Strontium-90, and eight times the legal amount of the radioactive isotope tritium, reports the BBC . A TEPCO official says the working theory is...