SN Online SN Online By Science News July 15, 2011 at 10:25 am - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print BODY & BRAINInfants may learn speech sounds as they snooze. Read “Sleeping babies learn in an eyeblink.” LIFEResearchers find a natural screwlike joint — in a beetle’s hip. See “Weevils evolved nut-and-screw joint.” MATTER & ENERGY An acoustic cloak made of metamaterials reflects sound off a bump as though it were a flat wall. Read “You haven’t heard it all.”