Specifically, he says the key period was 1900-1930. I guess something like https://en.wikipedia.org/wiki/Timeline_of_scientific_discoveries#20th_century https:

Specifically, he says the key period was 1900-1930. I guess something like https://en.wikipedia.org/wiki/Timeline_of_scientific_discoveries#20th_century https://en.wikipedia.org/wiki/Timeline_of_scientific_discove... can be helpful, but I think none of the discoveries in the last 30 years are quite as world-changing as general relativity, atoms, quantum physics, or galaxies.