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To learn more about humans, a large international team of scientists spent years tracking down some of the strangest creatures on Earth. They camped out on an Arctic ice floe to collect DNA from the one-tusked narwhal, netted a tiny bumblebee bat in a cave-rich region of Southeast Asia and ventured behind the scenes at a Caribbean zoo to draw blood from the slender-snouted solenondon, one of the world’s few venomous mammals.
Researchers compared the genomes of these mammals with those of a…
