Starting a search is easy. Knowing when to stop searching is not. When it comes to suspending a search, there is no standard ...

An optical illusion is a fascinating visual trick that plays with the way our brain and eyes work together. Sometimes, what we “see” isn't really what's “there,” and that's what makes optical ...

Giant mounds of sand discovered beneath the North Sea off Norway may scramble what we know about a key geological process.

From unexplained phenomena to baffling disappearances, follow the clues while discovering our country’s treasured protected ...

Favignana, off the west coast of Sicily, is known for its stone quarries, clear waters and fabled fish. A writer explores by ...

Soak, splash, or shower under the sky. From South Africa to Uganda, these dreamy stays bring you closer to nature.

Kentucky's Red River Gorge is a playground for adventure-seekers, whether its rock climbing, ziplining, or hiking. This ...