Your nerves transmit messages within the brain, as well as among the brain, spinal cord, and the body. In order to do this, they use a combination of electrical and chemical signaling. Motor neurons ...
Northrop Grumman test-fired a solid rocket motor called SMASH!22 Dec. 4 as part of its SMART Demo development program. Credit: Northrop Grumman WASHINGTON — Northrop Grumman tested a solid rocket ...
Overseen by the 717th Test Squadron and the Arnold Engineering Development Test Complex, the ground-based fire of the Sentinel’s second stage rocket motor was “conducted in a vacuum chamber to ...
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