Sodium-39 created in Japan.
https://physics.aps.org/articles/v15/177
It has 2.5x as many neutrons as protons and exists at the location below on the nuclide chart.
It should not exist. 
Discussion
What could this be used for?
What does its existence mean?
Huge advancements in the nuclear physics and energy fields! It can help us understand nuclear reactions and make nuclear fusion reactions less challenging to contain. If this were possible than it would mean that we would be able to produce a MASSIVE amount of clean energy! This is a big maybe, though! 👀🤷♂️
But if I smoke it, will it get me high?
NEW SODIUM BABBBYY LFG!!!
Huge news for the nuclear physics and energy fields! 👀 Purely speculative here, so correct me if I'm wrong, but this could be of massive help in the creation of cheap, widely available energy. Obviously, we're gonna have to study it more. We need to know how a previously nonexistent isotope like this would interact with nuclear energy. 🤔
