This category is to include all related material from the works of sci-fi author Hal Clement, as at least three of his best known novels - Mission of Gravity, Close to Critical and Starlight - are known to be set in the same universe.
“Symbiotes are a sapient amorphous species resembling a green gelatinous mass. They are made up...Symbiote (Needle)
“The Drommians are a spacefaring extraterrestrial species hailing from the planet Dromm and one...Drommian
“Tenebra is a planet with an unusually dark, foggy atmosphere, orbiting the giant star Altair. It...Tenebra