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Jessica Wynn

๐Ÿ‘ค Speaker
956 total appearances

Appearances Over Time

Podcast Appearances

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

You know, consider skateboarders and surfers who ride with what's called goofy footed.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Even animals show handedness.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Cats, dogs, horses, chimps.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

No male cats are more likely to be left pawed.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Yeah, many animals are handed or pawed.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

So handedness in animals is a widespread phenomenon, not an exception, and can provide insights into evolution and brain development.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

So studies on cats and dogs show a significant portion of each species has a dominant paw.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Though the ratio of left-to-right pawed individuals can vary, but male cats are more likely to be left pawed when completing tasks like getting food from the bowl or things like that.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Other mammals like horses, squirrels, and chimpanzees also show limb preferences for tasks like cantering, stripping acorns, or using tools.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

I mean, it's all tied to brain lateralization where different functions are concentrated in one of the two hemispheres of the brain.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

So we see it in every species.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

For example, young chicks tend to peck grain on one side.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Tortoises consistently turn to one side to right themselves when flipped over.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

In the animal kingdom, there's an evolutionary advantage to favoring the left, even if you don't have hands.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Like snails with left coiling shells have an advantage against predators who have adapted to crack more common right coiling shells.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Isn't that crazy?

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Remarkable.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

Actually, they seem to be.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

The blue whales perform specific movements like barrel rolls to feed with a preferred side, showing a consistent handedness or finned, whatever you want to call it, in their behavior.

The Jordan Harbinger Show
1272: Left-Handedness | Skeptical Sunday

The octopus, which, by the way, is my least favorite animal on the planet, has eight equally nimble arms, but they show a preference for using one tentacle to inspect or handle objects.