Learn why some of the most prominent ancient cities were built underground and which ones you can still see today.

Scientists have identified Acidalia Planitia on Mars as a potential hotspot for alien life, with conditions ideal for ...

Sonic the Hedgehog 2 introduced the Chaos Emeralds to the live-action movie series, and here's everything we know ahead of ...

Videos of a small asteroid entering Earth's atmosphere and creating a bright fireball over Yakutia, Russia, have left social ...

Why haven’t we found aliens yet? From cosmic vastness to self-destruction, here are intriguing reasons scientists think alien ...

The dynamics between predator and prey are laid bare in a striking image of fish being attacked by sharks in the shallow waters of the Maldives, which has claimed the top prize in this year’s Royal ...

Ben Affleck and his kids Fin Affleck and Samuel Garner Affleck spotted taking a walk in the Brentwood neighborhood of Los ...

Across North America, at least 70 imported, alien earthworm species are quietly altering our ecosystems, posing a largely ...