1.LETTER doi:10.1038/nature13539 Widespread mixing and burial of Earth’s Hadean crust by asteroid impacts S. Marchi1 , W. F. Bottke1 , L. T. Elkins-Tanton2 {, M. Bierhaus3…
New Young Stars (both human & astronomical) in the Gum Nebula New Young Stars (both human & astronomical) in the Gum Nebula Mark Legassie Spitzer Science Center GISS…