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We may have evolved to make love, not war, but we ALSO evolved to use our fists!

Scientists think that human hands evolved not only for the manual dexterity needed to use tools, play a violin or paint a work of art, but so men could make fists and fight. Compared with apes, humans have shorter palms and fingers and longer, stronger, flexible thumbs–features that have been long thought to have evolved so our ancestors had the manual dexterity to make and use tools.
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Human hands glow in the dark, and our fingernails produce the most light. In fact, most living things release light. If our eyes were sensitive enough, we would be able to see other people glowing in the dark. If we could see this light with our naked eyes (which we can’t), we might see that we leave a short-lived light trail of footprints wherever we go. Being able to follow this would be a wonderful forensic tool for chasing bad guys. Being able to “read” a person’s glow could also be an effective, non-invasive way to diagnose disease.
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