Original: Hyperthermophiles are a subset of extremophiles, micro-organisms within the domain Archaea, although some bacteria are able to tolerate temperatures of around 100 Â C (212 Â F), as well.
Simplified: Hyperthermophiles are mostly in the Archaea domain, but some bacteria are able to tolerate temperatures of around 100 Â C (212 Â F) as well.