Water is the most dense at 4 degrees Celsius (39.2 Fahrenheit); one liter at this temperature weighs almost exactly one Kilogram.
Angel Falls, Venezuela is the tallest uninterrupted waterfall in the world. The water drops 3,212 ft (979 m).
The blue whale is the loudest animal on earth. A blue whale call can travel hundreds of miles across the water, and it is louder than an F18 jet fighter.