In about 200 million years, the length of a day on earth should reach 25 hours. Thursday's increase in tesla's share price pushed musk past jeff bezos, who had been the richest person since 2017 and is currently worth about $184 billion. The number of people on earth continues to climb, reaching eight billion last november But the future population trajectory may hold some big surprises. In 1960 we were 1 billion children below 15 years of age and we were 35% of the world population Now there are 1,9 billion children in the world, but they are but 27% of world population.
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