Australia's giant Parkes radio telescope detected a "fast radio burst," or FRB, last May. Researchers call FRBs, whose origins haven't been explained, "tantalizing mysteries of the radio sky." CSIRO/EPA/Landov hide caption

itoggle caption CSIRO/EPA/Landov

Beemer, shown at the Mars Society's Mars Desert Research Station in Utah in 2011, is a candidate for both Mars One and the Mars Arctic 365 program. Max Fagin hide caption

itoggle caption Max Fagin

A negative image of Kks3, made using the Advanced Camera for Surveys on the Hubble Space Telescope. The core of the galaxy is the right hand dark object at the top center of the image. D. Makarov/Royal Astronomical Society hide caption

itoggle caption D. Makarov/Royal Astronomical Society

Larkin Carey, an optical engineer with Ball Aerospace, examines two test mirror segments designed for the James Webb Space Telescope. The mirror for the scope is extremely powerful, but heavy and pricey. NASA hide caption

itoggle caption NASA