Among the most persistent claims is that extraterrestrials assisted in the construction of ancient civilizations.

More than 2,500 alien plant species could find suitable conditions in the Arctic, especially in northern Norway and Svalbard.

Human intelligence wasn’t a cosmic evolutionary fluke, some scientists say. The case against cosmic loneliness is growing.

As the son of archaeologists, National Geographic Explorer David Stuart spent his childhood wandering ancient Maya ruins—and helped shape what we know about the civilization today.

For more than 60 years, scientists have been scanning the skies for signs of intelligent life beyond Earth. Using powerful telescopes, they have searched for unusual radio signals, brief laser flashes ...

With Area 51 ruled out by President Obama, where might aliens really be hiding? Scientists have now revealed the best candidates.

Astrobiologists propose that alien civilizations need accessible coal deposits to industrialize exoplanets and become detectable from Earth.

View post: Old Farmer’s Almanac Predicts Cold Spring for 8 U.S. States Archaeologists discovered a 5,200-year-old canoe in Wisconsin, predating Egypt’s oldest pyramid. Sixteen ancient dugout canoes ...

The metal shard had fascinated UFO enthusiasts, some speculating that it could be a piece of alien technology capable of levitation. However, after thorough analysis by the All-Domain Anomaly ...

One proposed solution to the Fermi Paradox suggests that intelligent civilizations remain silent by necessity. Advanced technology makes detection equivalent to exposure, and exposure could invite ...

When ET phones home, it could be his last call. Contrary to sci-fi movie depictions, our first contact might not be with a super advanced alien civilization at the height of power. Rather, Ivy League ...