Humanity weighs in at 287 million tonnes

Humanity weighs more than 5400 Titanics. Biologists have calculated the total mass of all humans living on Earth, which they say is a better way of measuring our impact on the planet than simply counting our numbers.

Scientists used 2005 data on body mass index (BMI) and average height to work out the average body mass of people for each country. By factoring in population data, they calculated that the total adult population weighed 287 million tonnes. The true figure is larger – as they did not include children – and will grow over the coming decades. Learn more here.

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