'Blue Stonehenge' discovered

(PhysOrg.com) -- Archaeologists have released an artist’s impression of what a second stone circle found a mile from Stonehenge might have looked like.

Russian site may show late Neanderthal refuge

Who's better at teaching difficult physics to a class of more than 250 college students: the highly rated veteran professor using time-tested lecturing, or the inexperienced graduate students interacting with kids via devices ...