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?
Ideally, the foal should stand and nurse within 30 minutes to one hour after birth. Unfortunately, many horsemen panic and attempt to over assist the newborn by forcing the foal to stand and nurse immediately following birth. Unwarranted assistance at this time will result in a stressful situation and a tired foal.