Thantology and Apothecary research options appear when attempting to research on the research machines even when the relevant packs are unavailable.
I had originally noticed this shortly after Life & Death came out, but didn't get a chance to test on an un-modded save before I purchased the pack. These screenshots were taken after disabling Life & Death and Enchanted by Nature from the Options menu with the new feature in a save created after mods were removed.
