👉 Hikarchaeia is a biological concept that describes the distribution, abundance, and diversity of ancient microbial communities found on Earth's surface. These communities were formed during the Paleozoic era (256 million to 78 million years ago) when the planet was covered in oceans and seas. Over time, these communities have coevolved with various types of microorganisms, including bacteria, fungi, archaea, and protists, which have evolved unique characteristics and adaptations that reflect their
