If the hair on your body was longer and thicker like animal fur, having goosebumps would fluff up your fur coat and make your hairs stand up. It would also provide more insulation to keep you warmer.
The average resting adult consumes about the same amount of energy as a 100 watt light bulb; that's more than 600 AA batteries per day.
Hail stones can sometimes contain pebbles, insects and even nuts. Large hailstones fall faster than 100 miles per hour.
Unlike AM and FM radio, shortwave radio stations can be heard thousands of miles away, even around the world under the right conditions. The most powerful stations may use up to 500,000 watts to broadcast their signal around the world.
Water is the most dense at 4 degrees Celsius (39.2 Fahrenheit); one liter at this temperature weighs almost exactly one Kilogram.