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?
I'm 17 years old male and I got a x-ray to see if I'm growing or not. The doctor only x-rayed my wrist and elbow and said that my growth plates are closed. I read somewhere that the order of growth plates closing is growth plates in the knees generally close at about the same time as the ones in the wrist.