Discoveries are a catch-all category of numenera that don’t fit into the other categories. These are not devices people can claim as their own. You probably can’t take a discovery with you, and there is usually no reason to do so, anyway. A discovery might be a bio lab where genetically engineered creatures are still being artificially produced, a receiver that picks up signals transmitted from a station on Mars, or a still-functioning hovertrain. While these discoveries can be useful, they do not make a person stronger.