> In hindsight it's weird Not, if you know that there was simply not even a concept of nuclear fusion in 19th century, and that the year of discovery of electr

> In hindsight it's weird Not, if you know that there was simply not even a concept of nuclear fusion in 19th century, and that the year of discovery of electron is 1897, and of the existence of atomic nucleus 1909. Tangentially, but also interesting and illuminating how non-trivial all that was at that times, neutron was discovered as late as 1932 -- the same year that Hitler became chancellor of Germany. It is that recent, and it was that hard.