Redefining the kilogram was incredibly difficult, but scientists have done it

As you stand in the produce aisle of the local grocery store weighing bananas, few have wondered exactly how we come by the pounds, kilogram...

As you stand in the produce aisle of the local grocery store weighing bananas, few have wondered exactly how we come by the pounds, kilograms, ounces, and grams that are used to measure the weight of something around the world. As it turns out, deciding on a standard way to know that a kilogram is a kilogram is very difficult. … Continue reading

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