Incredible map shows every country that's been invaded by Britain - only 20 never were
During its history, Britain invaded the territory of more than 170 countries, equivalent to almost 90% of the world.
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Earth Could Have Billions More People Than We Ever Realized
Is our little blue marble of a planet actually a lot more crowded than we thought? A new study suggests we've been significantly undercounting populations in rural areas, because of the grid-based ...