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Alaska’s top-heavy glaciers are approaching an irreversible tipping point
The Telegraph· 21 hours agoThe melting of one of North America’s largest icefields has accelerated and could soon reach an...
Hummingbird Migration Can Mean Flying 2,000 Miles Without a Break
HowStuffWorks· 5 days agoRuby-throated hummingbirds migrate annually from the U.S. all the way to Central America. How often...
Army’s High-Flying Balloon Surveillance Vision Grows With Call For New Radars, Other Sensors
THE WARZONE· 6 days agoThis is part of broader and still-evolving plans for a distributed high-altitude network to help...