With sections for: composition, atomic model, thermonuclear fusion, periodic table, radioactivity, positron emission tomography, fission of uranium, nuclear reactor, and atomic scientists.
Wow that's a lot of information for a Puzzle and one very nicely designed at that.
Congrats on putting this 1,000 piece beauty together.
These things make me realize how very much I still have to learn--and in this case, it starts with all these small things. ;-)
(Source Photo: Andy Blumenthal)