NBC News' Gadi Schwartz reports on "3I/ATLAS," a mysterious outer space object that is thought to be billions of years old, ...

The tropical rainforest of the Congo basin is the world’s second-largest. (The Amazon is slightly bigger, but far better studied.) Via the Congo river, water drains into the Atlantic largely from six ...

Archaeologists recently uncovered a mysterious grave in an idyllic German town with clues that hint at a tragic story. The findings were announced by the German town of Vaihingen an der Enz in a ...

A mysterious human skull found in the 1930s has been identified as an existing species after once being thought to be a new species all together, according to researchers. The studies — posted in the ...

The legendary island near Ireland first appears on maps around 1330. Meanwhile, the earliest mention of Brasil Island in the ...

The vast majority of matter is dark – invisible until it is detected only through its gravitational effects. The newly discovered object could be a clump of dark matter, or it could also be a compact, ...

As interstellar object 3I/ATLAS approaches its closest point to the Sun next month, the mysterious visitor continues to fascinate astronomers. The object, which is broadly believed to be a comet that ...

Astronomers believe they’ve uncovered the source behind mysterious cosmic signals known as fast X-ray transients (FXTs) — and it adds a grim twist to our understanding of the death of stars. Right as ...