A fossilised tooth left behind by the largest ape that ever lived is shedding new light on the evolution of apes. Gigantopithecus blacki was thought to stand nearly three metres tall and tip the scales at 600kg.

Before a momentous event occurs, there are numerous possibilities and different ways events can unfold. After it happens, however, it will appear inevitable. And after it happens, we will be very good at explaining why it had to happen.

Five mass extinctions have occurred since life began on Earth. Are humans causing the next mass extinction? And what does evolutionary theory predict for the world we will leave to our descendants?

It’s been argued that humans are no longer evolving, but now a growing number of people are integrating technology directly into their bodies.