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Oct 22, 2013 ... Man has been completely unsuccessfully trying to fly for centuries; The US government is paying academics large sums to develop airplanes; Two ... Humans have been controlling the fermentation process for thousands of years ... It has been suggested that the first yogurts were produced in goat ... May 8, 2022 ... Several thousand years ago, humans reached a milestone in their ... have started as early as 23,000 years ago. Sprawling civilisations ... This allows the trees to conserve energy by not having to reproduce new ones. It takes about two years for the bristlecone pine cone to reach maturity, which is ... Mar 12, 2012 ... But in the evolutionary timeline, people have only been around for one or two million years—this puts them toward the end of the timeline. This ... Some parts of the planet, such as the oceans and forests, absorb carbon dioxide and store it for hundreds or thousands of years. ... have produced a substantial ... The causes of poverty in every country are deeply rooted in the global system, which has been programmed over thousands of years to benefit the richest and most ... Over thousands of years, diverse American Indians built empires on this land ... had occupied for more than 1,000 years. As Caddo society became more ... The smelting process for bronze made with arsenic would have produced poisonous fumes. People may have preferred tin-based bronze or found that it was easier to ... An Egyptian stele portrays a priest with a withered leg, suggesting that polio has existed for thousands of years. 1789. British physician Dr Michael ...