SPACE WATCH
NASA – Chasma Boreale, a long, flat-floored valley, cuts deep into Mars’ north polar icecap. Its walls rise about 4,600 feet, or 1,400 meters, above the floor. Where the edge of the ice cap has retreated, sheets of sand are emerging that accumulated during earlier ice-free climatic cycles. Winds blowing off the ice have pushed loose sand into dunes and driven them down-canyon in a westward direction.
This scene combines images taken during the period from December 2002 to February 2005 by the Thermal Emission Imaging System instrument on NASA’s Mars Odyssey was part of a special series of images marking the orbiter as the longest-working Mars spacecraft in history.
Image Credit: NASA/JPL-Caltech/ASU
By Natallia Pinchuk, Nick Touran, Brian Wagner – A nuclear reactor is a system that contains and controls sustained nuclear chain reactions. Reactors are used for generating electricity, moving aircraft carriers and submarines, producing medical isotopes for imaging and cancer treatment, and for conducting research. 
NIST – a building is as secure against the environment as its most degraded joint sealants, about 50 percent of which fail in less than 10 years after installation. The upshot for U.S. homeowners is that moisture damage due to failed sealants is responsible for much of the $65 billion to $80 billion they collectively shell out for house repairs annually.
By Scott Bradner – Some of the people who object to what the FCC is doing claim that 
