When the air, oceans and even the burrows on land was inhabited with creatures a hundred times bigger in size and in varieties. Monsters, fiercier, faster and demonic. When even the earth worms could put todays normal Anaconda to shame. When humans could never ever come out to broad day light and lived ,more like rats,with dark the only cover, in constant fear of bein scooped off to air by a small sized flying bird if taken two steps outside. What happens when a pack of snakes, just decides to enjoy the warm sun in our neighbour hood. Humans'd have had the same fate. If so, how come modern scientists just get to the inference that humans could walk the walk all the way out of Africa to all parts of earth?