Correction for the weight of a Polar Bear
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How heavy is 72,800,000,000,000 nanograms?
It's about one-tenth as heavy as a Polar Bear
The weight of a Polar Bear is about 516,000,000,000,000.000000000000000000 nanograms.
(Ursus maritimus) (adult, male)
An adult, male polar bear weighs between 516,000,000,000,000.000000000000000000 nanograms. Polar bears are so heavily insulated by their 9.9 cm (3.9 in) layer of blubber that they are often difficult to detect using infrared photography sensors.