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?
My sisters horse is a 19 year old QH mare what is 15 hands and still goes like she is a 3 year old and she has a foal beside her but her foal is 8-10 months old and will be tied beside her mother of course so i am just wondering how long does it take for a horse to walk a mile?