Spicy foods have antifungal and antibacterial properties. In this light, humans have culturally and genetically evolved a preference for spicy foods because they protect us from microscopic assailants. When our taste buds encounter pungency, it's a signal to our brains that the food is cleaner.

Just like the weather, nature made sure that there are enough influencing factors that cause changes in hand-preference, like external, societal and cultural pressures, to result in various possible genetic combinations and chance influences.

This makes the entire process...

The core of many racist stereotypes is that race is a biological classification.

• We are told that race is a social construct, only to have scientists carelessly mention both race and ethnicity in their research papers.
• The majority of geneticists think genetic differences betwe...