11 Surprising Phenomena That Still Have Experts Scratching Their Heads

Inconclusive

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Despite their findings, investigators were not able to conclude with certainty that the epidemic was directly caused or connected to the Jelly rain, leaving the mystery of the epidemic and the weather phenomenon unexplained.

9. Right and left-handedness

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Statistically, there are more right-handed people (70%-95% of the population) that left-handed people (5% to 30% of the population) with some individuals able to function normally using both.
What leads to right or left-handedness and why do people develop hand dominance?