A very quick and easy one to mark 365 days of
Infinite Zounds. The physicist Wolfgang Pauli imagined its existence and called it something (let's term this variable 'X'). James Chadwick was chasing something else; when he found it, he also called it 'X'.
The Italian Enrico Fermi decided to do something about this confusion. Since what Chadwick found was bigger than what Pauli thought about, Fermi added the Italian suffix that means "little one" to 'X', thus giving the word 'Y'.
So what are 'X' and 'Y'?
[+ Show Answer]
'X': neutron, 'Y': neutrino. The latter term has been all over the news because scientists think they have found evidence of such particles traveling faster than light.