In the year 70,000 BC, Mount Toba exploded in the region where most humans resided. Some believe that the human population on Earth was down to about 1000 people. And we are all descended from them.
Of course, we were likely not much like humans today, probably hairier and with much sharper features. Not like in the movies.
But this is an interesting story, read the graphic below, and for more information check out the links!