Meet the sperm whale, nature’s deep-diving, squid-hunting heavyweight. And yes, that entire front half is basically head. Much like the pilot whale, they hold a specialized organ used for echolocation. In this case, it’s called the spermaceti organ. This wax-filled structure sits right in the forehead and may help the whale focus powerful clicks to navigate and hunt in pitch-black depths over 3,000 meters down. Also inside that giant block? The largest brain of any animal on Earth, weighing up t

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