While Otto Hahn is widely credited with the discovery of nuclear fission in 1938, it wasn't a singular invention. It's a complex process that involved the contributions of several scientists.

Here's a breakdown:

* Otto Hahn and Fritz Strassmann experimentally observed and identified the fission products, proving the splitting of the uranium atom.

* Lise Meitner and Otto Frisch provided the theoretical explanation for the phenomenon, using quantum mechanics and understanding the energy release involved.

* Enrico Fermi and his team conducted earlier experiments with neutron bombardment, paving the way for Hahn and Strassmann's discovery.

Therefore, attributing the "invention" of fission to a single person is inaccurate. It was a collaborative effort driven by various individuals' research and insights.