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?
CLOSER-A horse who runs best in the latter part of the race, coming from off the pace. CLUBHOUSE TURN-Generally, the turn closest to the clubhouse. COLORS-Racing silks-jacket and cap-worn by riders to denote the owner(s) of horse. COLT-Male horse under 5 years of age.