SPEARFISH, S.D. (AP) -- Sir Isaac Newton is long gone, but a scientist working on the Homstake underground lab in the Black Hills will explain gravity in simple terms Thursday in Spearfish. Cal Tech ...

Russian cosmonaut Oleg Kononenko with the magnetic bioassembler. Credit: Vladislav A. Parfenov and Stanislav V. Petrov, Laboratory for Biotechnological Research Astronauts have conducted all sorts of ...