Daily Extra :
weathering: The chemical and physical alteration of materials exposed to the environment on or near the surface of a planetary body.
Who Was Born Today?:
1932: Joseph P Kerwin, born in Oak Park, Illinois, Capt Med Corps USN/astronaut, Skylab 2
1948: Byron K Lichtenburg, Stroudsburg, Pennsylvania, astronaut, STS 9, STS 45
1952: Rudolfo Neri-Vida, Mexico, PHD/astronaut, STS 23
1956: George David Low, born in Cleveland, Ohio, astronaut, STS 32, STS 43
Who Died Today?:
Today in History:
1986: U.S.S.R. launches Mir space station into Earth orbit

