The Dabbahu Fissure, as it's now known, is evidence of a divergent boundary, where two tectonic plates are separating (the opposite is a convergent boundary). This is exactly what happened when ...

The East African Rift System is a 4,000-mile-long, 22-million-year-old zone that extends from Jordan to Mozambique. And it's been increasingly active in the past two decades, leading to speculation ...