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?
Knees Up! Stifle lameness in horses. Lameness involving the stifle is quite commonly seen in horses, but it can often be challenging to diagnose these conditions accurately. Firstly, an understanding of the complex anatomy is essential to appreciate the structures within the stifle that might be damaged.