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| Honey badger skin is thick enough to withstand machetes. | |
| By Michael Nordine | |
| If you remember that brief, glorious time when you couldn’t open a web browser without being treated to videos of honey badgers going absolutely bonkers, you may be unsurprised to learn their skin is thick enough to withstand blows from a machete. These notoriously fearless carnivores are also known for feasting on venomous snakes whose poison they’re resistant to, picking fights with larger predators such as lions and tigers, and having claws that can outgrow those of a black bear’s. Should you ever be unlucky enough to encounter one in the wild, you’d be better off running — whatever weapon you may have on you, it’s probably not nearly as tough as the honey badger. | |
| Mammals |
Maryland’s state sport is jousting. | |
| When you think of jousting, you probably picture medieval tournaments with knights galloping headlong toward armored opponents, aiming wooden lances, and smashing against each other in an explosion of splinters, sometimes with deadly results. So how did this form of combat training, which originated in France in the 11th century, become the state sport of Maryland? | |
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| Starfish pump seawater through their veins instead of blood. | |
| By Bennett Kleinman | |
| While starfish have plenty of limbs, they’re sorely lacking in other biological departments. For instance, these unique sea creatures don’t have a brain — or even blood. Instead, starfish are able to move, breathe, and feed thanks to the life-sustaining seawater coursing through their veins. Starfish possess what’s called a “water vascular system,” which is also present in other echinoderms such as sea urchins and sea cucumbers. This system is composed of a series of water-filled canals, and as seawater passes through the canals, it delivers nutrients and oxygen to the starfish. The water vascular system also aids in locomotion: As sacs within the system contract, they push fluid into the starfish’s feet, allowing those limbs to elongate and grab onto their surroundings. | |
| Across Species |
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