• Most adults need at least seven hours of sleep each night. Getting enough sleep can help prevent obesity, high blood pressure, heart attack, diabetes, and depression. 

• Octopuses have blue blood because the protein that carries oxygen in their blood contains copper instead of iron. 

• The brain burns around 400 to 500 calories each day. It operates on 12 to 25 watts, which is enough power to light an LED light bulb. 

• The heart beats an average of 100,000 times each day.

•  Everyone’s tongue print is unique, like fingerprints. 

• On average, a person blinks around 15-20 times per minute, and up to 28,800 times in a day.

• About two-thirds of people have experienced déjà vu—the eerie feeling of having already experienced a current situation.