The sun shone bright, birds zipped around the sky and tiny, vivid purple, yellow and white flowers flared at my feet.

Mineral formations in caves reveal recurring periods of humidity in the Arabian Desert over the last 8 million years.

A new study reconstructing the Arabian Peninsula’s ancient past adds clues to how early humans left the African continent.

Hiking the Pacific Crest Trail is a challenge, especially for adventurers making the entire run from Southern California to Canada, and Eric Kipperman’s job is to greet them at the sta ...