(Phys.org) -- One month and a day after celebrating its independence with fireworks exhibitions throughout the country, America will carry its penchant for awe-inspiring aerial pyrotechnic displays to the skies of another ...
Space Exploration
Jul 3, 2012
2
0
(PhysOrg.com) -- For years, the U.S. army and many other agencies around the world have been using hand-held green light-emitting signal flares; flares which are very nearly indispensable under certain adverse conditions. ...
With millions of people in the United States eagerly awaiting those July 4 fireworks displays — and our Canadian neighbors doing likewise for their July 1 Canada Day celebrations — here's a prospect for those light shows ...
Environment
Jun 22, 2009
1
0
