Are there any other measurements that have contributed to current understanding of Earth's core besides these two?
The answer is of course "yes". Other answers have already alluded to laboratory experiments that attempt to re-create conditions similar to those well inside the Earth.
I'll provide two others; there are many more.
One is radio ...
One book "Introduction to Wildland fire" by Stephen J. Andrews
The area burned in California has declined over 80% since Europeans arrived. And that’s not necessarily a good thing.
Prehistoric annual average acres burned: 4,447,897. 2010-2019 average acres burned: 775,325.
Xeric climate ecosystems that depend on periodic fires are essential to ...