I have been contributing my voice to public domain audiobooks on Librivox as a bit of a hobby. As one would expect, my bent is toward science and math, and one full recording I made, ready for consumption, is the eighth lecture on General Dynamics by Max Planck. Hear about space-time as only a contemporary of the theory can tell it!
A much longer recording of a 400-page book by Rouse Ball on the History of Mathematics is in progress. I picked up a lot of math and physics from reading both of these books. He goes, as many of these writers do, from antiquity to “modern times”, which for him end at around the year 1890, the decade of the book’s publication.