Massive Baby Boom in America 1,500 Years Ago 'a Warning Sign of Overpopulation'

A massive baby boom in North America 1,500 years ago should serve as a warning to modern man about the dangers of overpopulation, researchers have said. Scientists have discovered there was a massive growth in population among Native Americans between 500 and 1300 AD. Published in the Proceedings of the National Academy of Sciences, the scientists found that the boom came at a time when early signs of civilisation led to an increase in birth rates that "exceeded the highest in the world today". Researcher Tim Kohler, from Washington State University, said: "We can learn lessons from these people." Read More http://ift.tt/1r7ZsqO