Recent comments in /f/askscience

LastLapPodcast t1_jdtcr6q wrote

It's not misinformation. A bats wing and a whales flippers contain all the bones and joints in a hand but you don't say that those animals have hands. The foot to leg joint in elephants does not function the same as the ankle joint does in other four legged animals due to the way the heel structure is prevented from touching the ground. Yes, there is a joint there and yes it contains the same bones you find in feet but it doesn't do what those same bones do for other animals.

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FlattopMaker t1_jdt9cmi wrote

The magnetic field both causes and impacts the rate and most development as evidenced by magnetosomes in the fossil record and organisms today. Some species exhibit greater function in hypomagnetic conditions, and may have evolutionary impact when combined with known mutagenic effects of radiation exposure. We don't have known mechanism of action identified yet for the HMF (hypomagnetic field) theory and observations. Link to a review of speculations about causes and effects relating the magnetic field to the Cambrian explosion.

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goosebattle t1_jdt7tbi wrote

Important follow up question? What popular dance moves could an elephant do? The Charleston, the mashed potato, the twist, or flossing for example? Can you teach an elephant how to Dougie? Or a choreographed routine such as the macarena, chicken dance, or hokey pokey?

Edit: jazz hands, spirit fingers, and Bollywood are unlikely as elephants lack hands to perform the requisite movements. Twerking is on the table though, but perhaps not literally.

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LastLapPodcast t1_jdt2dob wrote

https://www.audubonsculptures.com/wp-content/uploads/2018/01/Anelephantfoot-1-e1517079923490.jpg

You can see from the skeleton that what you'd consider to be the ankle joint doesn't function like the ankle in other animals. The leg bones sit directly over with the animal walking on its toes. The calcaneum sits parallel to the ankle joint, essentially meaning the joint is fully extended any time the legs are straight. I imagine it as the same when a ballerina is on tiptoes, they also can't jump without either bending the balls of their feet (which elephants can't do) or by relaxing off their toes.

I will however concede that this alone isn't the only factor in the lack of galloping. The fact elephants have 4 forward facing knees also prevents a gallop.

Edit: the post below makes a very valid point that the joint in the front legs that performs the knee function is actually a wrist joint. The joint at the same level as the hind knees is actually a rear facing elbow joint. So it's more accurate to suggest they can't gallop because their legs bend the same direction when they walk/run. However the point around not being able to jump remains the same. The rear legs cannot produce the spring due to the way their feet are shaped and the way the joints sit. To gallop you must be able to propel your legs from the floor.

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TheresNoAmosOnlyZuul t1_jdst6i3 wrote

Honestly it looked like that elephant might have some hip problems. It did t wanna move it's back legs separately. The definition of a gallop is that all four feet are off the ground at the same time which is a physical impossibility for an elephant. I'd say it's entirely possible that an elephant can do a trot. I'm unsure about a cantor.

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