so if the human race is so intelligent as a whole then why is it that individual people act very rude, mean, harsh, and unintelligent for lack of better word?

What part of the female reproductive system produces ova

Which finger should not be used when measuring heart rate?

For several reasons you should only use hospital approved hand lotion two of the reasons are because they cause breakdown of latex gloves and can become contaminated with bacteria if dispensers are refilled what is another reason