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Pilots may presume that we now have access to accurate terrain maps nationwide, but in some remote areas, maps may be based on incomplete data or inaccurate observations that are decades old. "Mars is better mapped than the state of Alaska," Steve Colligan, president of E-Terra, an Anchorage mapping firm, told The Washington Post recently. Now the U.S. Geological Survey is leading an effort called the 3D Elevation Program, with the aim to chart all 50 states using state-of-the-art, accurate technology -- airborne lasers (lidar) or radar (ifsar).
For the last 25 years, inventors like garage tinkerers, physics professors and engineers have been trying to make a hovering skateboard.
Researchers have broken new ground in the development of proteins that form specialized fibers used in medicine and nanotechnology. For as long as scientists have been able to create new proteins that are capable of self-assembling into fibers, their work has taken place on the nanoscale. For the first time, this achievement has been realized on the microscale -- a leap of magnitude in size that presents significant new opportunities for using engineered protein fibers.