Also, understanding what went wrong with their ideas is often very illuminating. For example, the failire of the Michelson-Morley experiment is the basis for r

Also, understanding what went wrong with their ideas is often very illuminating. For example, the failire of the Michelson-Morley experiment is the basis for relativity and their test equipment was essential for QM! LIGO, for all its complexity, is just the Michelson-Morley experiment again, this time sensitive enough to detect waves in the ether rather than drag from our motion. Of course we've switched a lot of terminology around since then, but the idea is the same. Similarly, interferometery is integral to QM studies, and is a critical tool of modern science.