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CAT GOT YOUR TONGUE?
PENGUIN
Penguins are agile predators underwater, zipping around like torpedoes as they chase down fish and squid. But how do they keep their prey from squirming out of their grasp? The answer lies in what the birds already have in their mouths.
A penguin's mouth and tongue are covered in hard, backward-pointing spines called papillae. It's the same feature that makes a cat's tongue feel like sandpaper. But you wouldn't want a penguin to lick you - the spines aren't just large, they're also sharp (a lick from one of these would easily make you bleed). The spines dig into slippery prey and help move it down the bird's throat.
A penguin's tongue is also very muscular, so is probably used to push and manipulate the food in their mouths, like humans. Unlike us, however, penguins can't taste the fish they eat, as they don't have the genes to register sweet, bitter or savoury (umani) flavours. Scientists think that penguins lost their sense of taste because they don't use it: not only do they swallow their food whole, but the proteins needed to send taste signals to the brain malfunction at cold temperatures.
RAPID INFLATION
GULPER EEL
Food is scarce in the deep ocean, so animals living down there have to make every meal count. Few animals take this as seriously as the gulper eel, which is also known as the pelican eel as it shares a similar characteristic with the bird.
The gulper eel has a huge, loose-hinged mouth that's about a quarter of the length of its body. The mouth is paper-thin, fragile and unwieldy, so the eel tucks it away when it's not feeding.
Diese Geschichte stammt aus der August 2023-Ausgabe von BBC Science Focus.
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Diese Geschichte stammt aus der August 2023-Ausgabe von BBC Science Focus.
Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.
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