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Letters

Sinking heavy ice The picture in “From the Archive” (“Self-experimenter didn’t suffer,” SN: 1/28/12, p. 32) shows heavy water ice sinking in a glass of water while alongside, light water ice floats. What is not clear is what kind of water is in the glasses. If heavy water ice were in a glass of heavy […]

SN Online

ON THE SCENE BLOG Science can’t hear back in time. Read more in “Archaeoacoustics: Tantalizing, but fantastical.” Courtesy of Hagen Wende and Carmen Birchmeier GENES & CELLS An eye protein helps mice and people sense vibrations. See “Seeing, feeling have something in common.” LIFE Early fliers may have had dark feathers. Read “Archaeopteryx wore black.”