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New research reveals the U.S. states that saw the most lightning activity in 2020, with Texas again topping the list.

Northrop Grumman’s Cygnus cargo spacecraft undocked from the International Space Station on Wednesday and is set to test new technologies before its fiery destruction when it returns to Earth’s atmosphere.

A cannon used by the Germans during World War I has been discovered — nearly 4,000 miles away from where it was last fired.

A "sick" and "desperate" mountain lion has been spotted in a small Southern California town, leaving officials unsure why it has become weakened.

The famous Steamboat geyser in Yellowstone National Park won’t foretell a major volcanic eruption, according to scientists.

Archaeologists have uncovered dozens of 2,000-year-old army camps from Ancient Rome in Spain, according to a new study.

Despite pushback from some in the scientific community, one researcher at Harvard University is moving forward with the idea that the first interstellar object ever discovered is actually a piece of alien technology.

The crew aboard the International Space Station (ISS) rang in the New Year with a zero-gravity twist while in orbit about 250 miles from Earth.

The coronavirus pandemic has been the focal point for almost everyone on the planet in 2020, but there have been a number of achievements this year for those looking beyond Earth.

If 2019 was a big year for UFO coverage, 2020 may have been the best year ever. 

A supposed fast-food restaurant at Pompeii has been completely unearthed, helping to reveal dishes that might have been popular for the citizens of the ancient Roman city.

An enormous 16-foot long crocodile nicknamed the "swamp king" that terrorized ancient waters a few million years ago has been identified.

A massive dark storm on Neptune that was first spotted two years ago has suddenly changed directions, leaving experts without answers.

A 57,000-year-old wolf pup perfectly preserved in permafrost is finally unlocking its secrets after it was discovered nearly four years ago.

Just days after the Kilauea volcano erupted on Hawaii's big island, the aftermath of the natural disaster is now forming lava lakes and can even be seen from space.

Experts believe they may have discovered the furthest galaxy from Earth, more than 13 billion light-years away from our planet, according to a newly published study.

NASA has released a slew of pictures of the "Christmas star," a celestial event where the two largest planets in the solar system, Jupiter and Saturn, form what looks like a double planet.

No one can say for certain whether extraterrestrial civilizations exist, but one new study suggests the Milky Way is full of them, though many of them could be dead.

Three asteroids, including one that's larger than the Washington Monument, are set to safely fly past Earth on Christmas Day, according to NASA's Center for Near-Earth Object Studies.

HONOLULU (AP) — Kilauea volcano on Hawaii’s Big Island roared back to life Sunday night as lava went shooting into the air, boiling away a water lake and sending a massive plume of steam, gas and ash soaring into the atmosphere.