system
Given the following post, respond as if you're commenting on Reddit:
human
Please tell me major things that old physics books have misinformed me on.

I recently started reading *Feynman's Lectures on Physics*, and a few years ago I read *Asimov's Guide to Science*. They're both absolutely classic science texts from which I can/have learned a ton, but I also know there are some caveats in learning out-of-date information. Some of them I can catch from my own knowledge (Feynman said that we don't know the intermediate between DNA and protein; Asimov said that we don't have solid evidence smoking causes cancer and that freon is a natural wonder with no detrimental effects), but I know very little physics and incorrect facts in these fields I am likely to miss. 

Just curious, what are some big things that have changed, especially in physics (about which I know the least)? 

Thanks!
gpt
The Feynman lectures took place in the early 1960s, and a lot of little things have been learned since then, but not too many big things.

The structure of protons and neutrons was just being discovered in this decade, which lead to quantum chromodynamics, the theory of quarks (partons according to Feynman) and their interactions. This makes up part of the *Standard Model,* which was formalised in the 1970s. We have since discovered that neutrinos have mass and oscillate between flavours.

The biggest discovery was perhaps in the 1990s, when we realized that the expansion of the universe is accelerating and that the cosmological constant/dark energy exists.

There are also lots of discoveries in condensed matter like high temperature superconductivity and fractional quantum hall states. Nanotechnology was basically the brainchild of Feynman and it's been moving along since then.