HealthAugust 5, 2026
archaea
ar-KEE-uh
Definition
One of the two primary domains of single-celled, prokaryotic microorganisms that are distinct from bacteria and possess unique evolutionary characteristics.
Etymology
Derived from the Greek word 'archaios,' meaning 'ancient,' as these organisms were once thought to be the oldest forms of life on Earth due to their ability to survive in extreme environments.
In the news
In the article, archaea are described as one of the two main branches of life that independently developed their metabolic processes, suggesting life may have begun twice.
New Theory: Life on Earth May Have Arisen Twice Independently
Read the full article ↗BGNES