Dark Energy Wins Again

dark energy is really getting a high profile these days. the 2007 gruber cosmology prize was just awarded to the two teams that discovered the presence of dark energy in 1998: saul perlmutter (the supernova cosmology project) and brian schmidt (the high-z supernova search team). wonderful news. read more here. now, if we could just figure out what dark energy actually is, we'd be even better off. most recent suggestion, made by brian greene and janna levin, is that dark energy is lurking in hidden dimensions. if someone understands what that means and can explain it to me, please send me an email and we'll chitchat.