SN Online SN Online Share this: Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print By Science News July 15, 2011 at 10:25 am - More than 2 years ago 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.”