Physics nerds, feel free to add to this category.
“A causality paradox was a temporal phenomenon that took place when really sick time travellers...Causality paradox
“A black hole is the ultimate in galactic garbage pails. These phenomena were especially...Black hole
“A Planet is often a globe, although sometimes not. There are lots and lots and lots and lots of...Planet
“White holes, or quasars, were the opposite of black holes. Instead of sucking in energy like...White hole