An ancient Martian system of canyons and valleys could be home to archaic life forms, a ground-breaking scientific paper has found. Scientists investigating the Red Planet’s mind-boggling cave system ...

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Step off the desert trail and into Arizona’s longest cave, where crystal formations and subterranean wonders await.

Evidence that modern humans and an older hominin species used the same cave, probably during overlapping periods, has been ...

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp. One of ...

After eons underground, it was discovered by accident. Within a couple of decades, it was already under threat.

Best-selling Swiss author Erich von Daeniken, who built a lucrative career on his argument, rubbished by scientists and ...

Planning a park trip? These California national parks offer free entrance days that make unforgettable outdoor adventures ...

Ancient bones discovered in a cave in Casablanca, Morocco, could fill in some of the blanks about human evolution. The cave, known as Grotte à Hominidés, contains assemblages of jawbones, teeth, and ...

His book Chariots of the Gods?, which theorised that advanced aliens had repeatedly visited Earth, sold millions of copies.