For at least the last 200,000 years, between 10-15% of the human population are left-handed and this fact has utterly left science baffled. In searching to explain handedness, all sorts of contradictory evidence has emerged, creating a fascinating mystery. Learn all about it in this classic episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.
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Hand dominance is a widely accepted concept, however, studies suggest that the use of both hands may be necessary to perform certain tasks effectively.
The stigma associated with left-handedness may have developed from the practical difficulties lefties faced in a world designed for righties. In cultures that eat with their hands, using the left hand is often considered taboo.
There were two mutations, one about 200,000 years ago and the other between 20,000-100,000 years ago, that resulted in a preference for right-handedness and the localization of the language center to the left hemisphere of the brain.
A podcast about practical money topics briefly discusses evidence found on the skeletons of early humans and Neanderthals that suggests a right-hand preference, which could have developed from using spears and other tools.
The way our brains are wired is linked to handedness, with left-handed and right-handed individuals showing differences in brain structure and function. While handedness is a mostly human trait, some animals, such as cats, have also been found to show preferences for using one paw over the other.
Research suggests that left-handed people may process language in both hemispheres of the brain, leading to quicker and more efficient thinking. This may explain why some left-handed people talk more than right-handed people.
Left-handedness in combat might not be an evolutionary advantage, but it can provide an unexpected edge to those who use it. The prevalence of left-handed people may not have increased over time due to selection, but rather due to the element of surprise in combat.
The culture’s right-hand bias is seen in the design of everyday objects, prejudice in language and ignorance of plagues that have affected that population. Moreover, efforts to force kids to become right-handed have made them a less pronounced copy of themselves.
The speaker provides a tip on finding relevant information on websites like stuffyousshouldknow.com and howstuffworks.com by using the control F and web browser search options. He also shares that he was pleasantly surprised by the non-biased view of evolution presented on the podcast.
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