A solar-powered plane has landed in Texas, completing the second leg of a trip across the United States....
The massive circular structure appears to be an archaeologists dream: a recently discovered antiquity...
A smaller cousin of the Tyrannosaurus rex, called Allosaurus, may have fed on its prey in a fashion similar...
Now this is a piece of the rock. An asteroid, hurtling through space at tens of thousands of miles per...
High-tech weapons may be screaming through the skies at five times the speed of sound by the middle of...
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