(This does not match data I have from other (very reliable) sources but is nevertheless an interesting read.) In the summer of 1950, four nuclear physicists were walking to lunch from the Los Alamos National Laboratory in New Mexico. Their names were Emil Konopinski, Herbert York, Edward Teller, and Enrico Fermi.
One of them was not human.
https://www.nexusnewsfeed.com/article/geopolitics/fermi-s-other-paradox/