Less than 1 million years ago, bipedal - long distance running hominids covered the entire EuroAsian and African continuant's.
All currently living humans are descended from a relatively small tribe of such prehumans who lived on the beach between South Africa and Ethiopia 200.000 years ago. Their lifestyle (up until glacier melting led to inland rivers about 50.000 years ago) probably consisted of running the 5-20 mile lengths of beach and swimming across the dividing channels which range up to a mile or more. Such a beach/outer reef lifestyle would include exploiting the combination of offshore diving, bayside gathering, and a daily jog to beach comb for survival. In other words, humans are evolved to run and swim. Elaine is correct that we evolved to swim but she leaves out the more important long distance running part.
Sorry, but that's basically nonsensical. A human trying to cover 40 miles a day would just make a target out of himself for every predator on the veld. That is, if the human didn't simply keel over and starve or die of exhaustion, and women and kids trying to cover 40 or 50 miles in a day...
That's a joke. Elain Moprgan's ideas make a whole lot more sense to me at least. The most major difference between us and all apes and monkeys is legs being the major limbs, and that appears to be clearly an adaptation for swimming and wading as Morgan suggests.
You'd come closer to the correct date if you doubled that.
Found in the Republic Of Georgia, he's 1.7 million years old
"Stunning finds in the Republic of Georgia upend long-standing ideas about the first hominids to journey out of Africa "