Plutonium is much rarer in nature than uranium and is more commonly used for bombs rather than as reactor fuel. Like uranium, it comes in various isotope forms, with plutonium 239 the most commonly used. It is mixed with the much more unstable plutonium 240 to generate power.
It's my understanding that a horse's knees close around age 2- 2 1/2. My gelding JUST turned 3. A couple days ago in fact. Will a horse's knees almost certainly be closed by that age?
Regardless of their actual birth date, all race horses turn 1-year old on January 1 of the year following their birth. Prior to that they are referred to as a Foal, or a Weanling (a horse that has been weaned from its mother). The horseâs mother is called a Dam, and their father is a Sire.