A look at what caused the downfall of the Ancient Egyptians in 30BC, with new evidence revealing a cataclysmic event that shook the world and sowed the seeds of the empire's demise. Egyptologist Joe Manning and climate historian Francis Ludlow have traced this misfortune to an event in 44BC, when a colossal volcano erupted somewhere in the Tropics.

Experts analyse the remains of a victim of Roman crucifixion.