Early human carbon dating
C-14 is produced in the upper atmosphere when nitrogen-14 (N-14) is altered through the effects of cosmic radiation bombardment (a proton is displaced by a neutron effectively changing the nitrogen atom into a carbon isotope).The new isotope is called "radiocarbon" because it is radioactive, though it is not dangerous.First of all, it's predicated upon a set of questionable assumptions.We have to assume, for example, that the rate of decay (that is, a 5,730 year half-life) has remained constant throughout the unobservable past.“It’s a smoking gun for modern human interaction, but we haven’t yet found the bullet,” Roberts told ; a paleoanthropologist from University College London, María Martinón-Torres, believes that the premolar appears slightly more primitive.To conclusively prove the teeth are human, she believes they should be compared to a wide range of disappeared, supporting the possibility that humans contributed to the hobbits’ extinction by out-competing them for limited resources on the island.
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– the “hobbit” species – was discovered, have been carbon dated to approximately 46,000 years ago.
Because the upper premolar and lower molar are somewhat younger than any of the known hobbit remains, this new information seems to support the theory that humans were involved in the demise of , widely believed to be in the genus Homo, suggest they would have been around 3.5 feet (1.1 m) tall.
Animals which may have been a food source for early human hunter–gatherers, including giant storks (), and vultures (Trigonoceps), all vanish from the sediment layers in the cave after approximately 46,000 years ago.
During this same time period, freshwater mollusk shells start to show up.