00:00 Left-handedness and handedness in general is a topic that the hosts of the podcast are not very familiar with, but they have done research and are ready to discuss it.

04:30 Left-handed people have been historically maligned and picked on throughout history, possibly due to their status as a minority.

08:38 Left-handedness may have been historically associated with clumsiness and weakness due to the use of right-handed tools, and while there are theories about the origins of handedness, science is still unsure about why it exists and why the proportions of left-handed people remain steady.

13:13 The left hemisphere of the brain is associated with the motor cortex and language center, which explains why right-handedness is more common, but having the language center in the right hemisphere doesn't necessarily mean someone is left-handed.

17:54 There is evidence that humans have been mostly right-handed for the last 200,000 years, with a constant 10-15% proportion of left-handed people, and early tool building and teaching may have contributed to this majority.

22:28 Speech and fine motor skills are connected because language may have evolved from gestures and hand movements, and our fine motor skills are still necessary for tasks like eating; studies on primates suggest that the more primitive the primate, the more likely it is to be left-handed, implying that humans may have originally been left-handed and then evolved to be right-handed; ambidextrousness is a rare condition and there is no strict definition for what constitutes being ambidextrous.

27:05 Left-handedness has been linked to a higher propensity for schizophrenia, dyslexia, and stuttering, suggesting that left-handed individuals have differently wired brains than right-handed individuals.

31:36 Left-handed individuals may have faster processing speeds, better communication between brain hemispheres, and an advantage in sports due to their opponents being statistically more likely to expect right-handedness.

35:39 Left-handedness has not decreased over time due to natural selection, suggesting that there may not be significant disadvantages to being left-handed and that there may be advantages associated with left-handedness.

40:17 Left-handedness may have advantages associated with it, and training to use your dominant hand could potentially improve brain function.