A changing climate for human evolution

From the accumulated work of the last two decades, it is clear that East Africa has one of the most dramatically altered landscapes in recent geological history. Tectonic movements, climate shifts and changes in the sun's energy all influenced the planet over the period of time that humans evolved in africa. Each of these processes works at a different timescale, and together they have produced a unique and highly variable environment. Those environmental changes could well be responsible for humans walking upright and developing bigger brains. can make an important contribution to the field of human evolution.