Archaean used in a sentence

Archaean in a sentence as an adjective

This is a much more interesting argument than the ones downthread about mitochondria, et al. It seems to me to increase the urgency of understanding eukaryotic and archaean evolution so we can get a handle on exactly how hard that jump was.

For example, the Viking landers were sterilized by exposure to heat at 111 degrees Celsius, but the known upper limit of survival and proliferation temperature for thermophilic archaeans has since increased several times, with the most recent value I'm aware of at 122 degrees Celsius.