Two continents collided millions of years ago, forming a bridge that changed Earth's climate system and triggered one of history's greatest animal migrations.

Imagine walking into Petra, Jordan without the hustle and bustle of tourists clamoring over each other for photos and mule ...

Dromedary camels walk through sand dunes in the Arabian Desert near Margham, Dubai, United Arab Emirates. A new study adds evidence to theories that this region was once a wet, green climate.