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?
[QUOTE=DarkHorseDream;1040065]I'm just curious on your input on the question, how long can horses safely lay down? Here's is what i have learned from research and people who know what they're talking about who I know personally: horses that stay in stalls 24/7 lay down much less often because they're more insecure.