A. Plutonium. The world's first nuclear explosion was achieved with plutonium, a man-made element produced in nuclear reactors. Plutonium is created when an atom of uranium-238 absorbs a neutron and becomes plutonium-239.
Infinity Tattoo Meaning. Infinity tattoos are steadily on the rise with many people opting to get these in one form or another. The infinity symbol, often used in mathematics, represents a never-ending loop and is depicted as a number 8 on its side. In the tattoo world this can be seen as a symbol of never-ending or limitless possibility. Some cultures also believe it to represent rebirth or reincarnation.
We could put a stick to the dirt and drag it around and make a circle that represented our world, our universe. All of our understanding of the meaning of the circle symbol stems from that one moment of looking out from the eyes of the first human. The circle symbol meaning is universal - it represents the infinite nature of energy and the symbol of the universe. The Circle Christian Symbol represents eternity. The circle symbolizes eternity as it has no beginning or end. Because of this many early Christians believed that there was something divine in circles.