Water polo balls come in sizes 2, 3, 4 and 5. They are suitable for the following: Size 5 – is used for the men's game. The ball rules state the ball's circumference shall be between 680mm and 710mm, with a ball pressure 12 – 13 psi.
Is a water polo ball the same as a volleyball? Some people think that water polo is similar to volleyball because of the water polo ball's shape, but the sport itself is more akin to soccer/volleyball instead due to there being two goals on either side of the pool. Read More...
High School and College
These footballs measure slightly smaller than an official NFL-sized football. Depending on the player's hand size, either of these balls works well for ages 14 and up.
Is NFL football same size as high school? All footballs, however, must fall within the guidelines set forth by the NCAA. There is in fact one more size beyond college footballs, and that's the balls in professional leagues. Read More...
Bats are the most significant predators of night-flying insects. There are at least 40 different kinds of bats in the U.S. that eat nothing but insects. A single little brown bat, which has a body no bigger than an adult human's thumb, can eat 4 to 8 grams (the weight of about a grape or two) of insects each night.
What human food do bats eat? Megabats like the fruit bat and flying foxes live mostly on fruit. Read More...