We have Heath ceramics and they are hefty and beautiful and I love them. Very solid feeling. I wouldn't recommend microwaving them, they say microwave safe ("just don't microwave a turkey on them") but they do absorb the microwaves so the food doesn't get as warm.

But the temp wasn't that low. 24C is 75F and they went up to 30C which is 86F. Both temps are relatively warm. I wonder why the study didn't move a third group to a colder chamber, like 18C?

This is the answer right here.

Edit: I feel like it's worth adding a comment about how big chemical libraries are and how big chemical space is. For the uninitiated, "chemical space" is the number of different molecular structures that can be made. For drug-like molecules, an oft-quoted number is on the order of 10^30 to 10^60 different chemical compounds. This is an astronomically large number; think "number of stars in the known universe" large. For perspective, the largest screening libraries are in the millions of compounds (10^6) and virtual screening libraries are in the billions (10^9), but they're always getting bigger. Finding new drugs is truly an undertaking.