1539. - Roots

I pseudoprune, descendés of the monkey, like all :-)

it is an entertaining pastime, if a group of physicists puts himself, they have the most difficult part made, because the 'old' physicists are already almost all: Bohr, Heisenberg, Einstein, Sommerfeld... (and the oldest, with more reason: I found round there Ohm, now I have to add the Huygens line in Leibniz, etc)