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39 grains is about 0.00000003 times as heavy as a Blue Whale.
In other words, it's 0.00000002420 times the weight of a Blue Whale, and the weight of a Blue Whale is 41,300,000 times that amount.
(Balaenoptera musculus)
Blue whales weigh between 1,610,000,000 grains. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 15.40 grains each.
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