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Why do people blush?
science.howstuffworks.com/blush.htm
Blushing is actually related to the same system that triggers your fight-or-flight response. Find out what causes blushing and how blushing works.
Is the army testing an invisible tank?
science.howstuffworks.com/invisible-tank.htm
An invisible tank could give any military a distinctive edge on the battlefield. Find out how the British army is developing an invisible tank.
Has a surfer discovered the theory of everything?
science.howstuffworks.com/science-vs-myth/everyday-myths/theory-of-everything.htm
The theory of everything seeks to explain the workings of every single aspect in the universe. Learn more about A. Garrett Lisi's theory of everything.
Will we soon be extinct?
science.howstuffworks.com/life/evolution/mass-extinction.htm
A mass extinction on Earth is long overdue, according to population ecologists. Find out what Earth's fossil record may be telling us about our future.
McDonnell Douglas F-4 Phantom II
science.howstuffworks.com/mcdonnell-douglas-f-4-phantom-ii.htm
In its first few years, the McDonnell Douglas F-4 Phantom II set eight new aviation records, among them altitude (98,557 feet), speed (1,390 mph), and time to climb (9,000 feet in 34.5 seconds). Learn details about this popular and powerful aircraft.
Lockheed P-38 Lightning
science.howstuffworks.com/lockheed-p-38-lightning.htm
The Lockheed P-38 Lightning was considered the most sophisticated aircraft Lockheed had ever built. The distinctive sight and sound of the P-38 would make it one of the best-known aircraft of the war. Learn more about the unique P-38 Lightning plane.
Yakovlev Yak-9
science.howstuffworks.com/yakovlev-yak-9.htm
The Russian Yakovlev Yak-9 was faster and more maneuverable than many other planes. The Yak-9 model also featured more metal in the structure, so it was lighter and more maneuverable than earlier iterations. Read more specs for the Yak-9 airplane.
Where does your unclaimed luggage end up?
science.howstuffworks.com/transport/flight/modern/lost-luggage.htm
Unclaimed luggage usually ends up at the Unclaimed Baggage Center in Scottsboro, Alabama, where it is then sold. Learn more about unclaimed luggage.
Why Is Yawning Contagious?
science.howstuffworks.com/life/inside-the-mind/human-brain/contagious-yawn.htm
Contagious yawning is associated with the same parts of the brain that deal with empathy, according to a recent study. Learn about contagious yawning.
10 Memorable Meteor Crashes
science.howstuffworks.com/10-memorable-meteor-crashes.htm
Hundred of meteors fly across the sky every night, but only a few make it to Earth. Learn about 10 memorable meteor crashes that left an impression.