Metre-wide cracks in the ground suddenly split open, as red-hot rock and ash are thrown violently into the air amid searing temperatures. It's like a vision of how the Earth behaved in prehistoric times. Except these events have happened within the last three years in Ethiopia's Afar region. What's more, a matter of days ago there was more extreme volcanic activity there, with reports of the country's biggest eruption to date - and the largest recorded lava flow in scientific
history.
