NASA has revealed a 328-foot-wide hole on Mars, potentially a gateway to subterranean caves that could harbor alien life.

A hidden room inside Mount Chiliad tied to UFO theories and the infamous mural, finally spotted through recent leaks.

A team of NASA-funded University of Northern Iowa researchers is exploring some of the deepest caves in the United States to ...

NASA has admitted that an over 300-foot-wide hole in the surface of Mars could be a 'portal' leading to alien life hiding ...

Shenandoah National Park’s Thornton Gap entrance sits just minutes from downtown, providing access to Skyline Drive – the 105 ...

Looking to take an underground adventure in the state of Missouri? There are many wonderful caves you can visit, depending on ...

The House budget includes $1.2 million to use drones for creating a 3D map to identify pollution sources threatening clarity ...

Geologists say Kentucky’s natural underground drainage system is overwhelmed following the recent massive rainfall - ...

Fluorescent cave minerals are helping scientists explore how life could survive in harsh places like Europa. Far beneath Earth’s surface, rock and mineral formations conceal a hidden brilliance. When ...

Cave lovers and adventurers will find all kinds of caves to explore, from underground to beachfront and everything in between. They truly are one of the best things to do in Puerto Rico. As a Puerto ...

So, make sure you have a GPS trail map handy, and your sturdiest shoes — and get ... as the latter includes abseiling and squeezing through tight spots. This system of underground caves (well, lava ...

The “bone digger” slides into a thin crevice on a hill in the Okinawan jungle. He’s a slight man, nimbly fitting his frame through the cave entrance, carefully avoiding the sharp limestone roof while ...