Jordan Flowers claims Russia and China may be reverse-engineering alien technology, raising national security concerns.
Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life. The problem is not finding the star.
NASA discovers extreme planet: Astronomers are witnessing an alien world's dramatic transformation thanks to the James Webb ...
When we think of planet killer asteroids, survival odds might seem slim. But we aren't defenseless.
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