Carbon dating of genesis
The geologic time frame preceding the six days of Genesis correlates roughly with the end of the great "Ice Age" at the Pleistocene/Holocene epoch boundary, which dates to about 13,000 - 10,000 radio carbon (C14 ) years before present (BP = "1950").As mentioned previously, the geologic record reveals a mass extinction episode at this time in which hundreds of large and unusual forms of megafauna mysteriously perished from the face of the Earth.The first indication of hunting does not appear in the Bible until after Noah's flood.
Here are a few links to recent reports concerning the effects of the Younger-Dryas event: Diamonds suggest comets caused killer cold spell - Comprehensive analysis of impact spherules supports theory of cosmic impact 12,800 years ago - New evidence that cosmic impact caused Younger Dryas extinctions.
Their replacement "kinds" of today's world are quite different in both size and morphology.
The leading scientific theory was that humans hunted these animals to extinction, but that theory is losing favor for lack of direct evidence.
Would it not seem logical that a global event of this magnitude and severity, which wiped out the giant mammals, would also wipe out the humanoids that hunted them?
Could a population of nomadic hunters quickly switch to an agriculturally sustained society, especially at a time when the Earth's average temperatures had plummeted sharply? Keep in mind that according to the Bible, Adam and his linage began as tillers of the soil and herdsmen after Adam's fall.
Some hold that they were killed off by "man" for food, by disease, their inability to adapt to a changing post-glacial climate, or some combination of all.