There were schools of thought in Ancient Greece that speculated about extraterrestrial life, in trying to answer questions ...

On a hot February morning, Galápagos National Park rangers released 50 giant tortoises back to Floreana Island—marking the beginning of a historic comeback.

A reported illegal immigrant from Mexico is jailed after being taken into custody during a Nashville traffic stop.

The animal lovers at Maymo follow a dog watching aliens parachute down, tilting its head in surprise while curiosity and chaos collide.

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

But the real truth is that alien life on other planets could be even stranger than floating balloons or amorphous organisms ...

Step inside a dazzling fantasy world full of magical creatures, meet a boy struggling with big family changes, share laughter ...

These researchers captured photos that wouldn’t look out of place in an art gallery and used them to confirm new species of comb jellies never recorded in Colombia before.

The Care Bears are headed to the Upside Down with their new Stranger Things collab, and it’s chaotic, cute and nostalgic.

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Republican Rep. Nancy Mace of South Carolina fields a measure to declare aliens who are convicted of animal abuse as deportable and inadmissible.

Titles include rural Nebraska in the grip of chaos, a surreal quest, a horribly real one in the Middle East, killer robots ...