Necessity is the mother of all inventions. During a medieval siege, the attackers ran out of ammunition. So the chopped of a peasants head and fired it from a trebuchet. It hit a King's son and killed him outright.
It was the first instance of a serf face to heir missile...
The Prime minister wants everyone to learn maths until they're 18.
I finished studying maths at 16.
What difference would the extra three years have made?