The Slow Ones are amorphous creatures whose chemistry is based on reducing, rather than oxidizing compounds. Their metabolism is extremely slow, to the point that any action which for Humans would take minutes to perform; for them will take months or years.
A group of them have been visiting the Earth, brought as passengers by Chirpsithra interstellar liners. To Humans, they appear like statues. They need to wear protective armor to prevent contact with oxygen. They engage in touristic activities such as watching redwoods grow or riding glaciers.
- The Slow Ones (2006)