Plimsoll line The Plimsoll line was invented by Samuel Plimsoll.
The present standard model of cosmology indicates that what, not detectable directly but deduced by its effects, constitutes at least 84.5% of the total mass of the universe?
What ship, formerly called USS "Phoenix" which saw action in World War II, became the first to be sunk by a nuclear-powered submarine, in 1982?