"Half of all life"

"Half of all life" refers to the idea that approximately 50% of all living organisms on Earth are microorganisms, primarily bacteria. These tiny, single-celled organisms are incredibly diverse and exist in almost every environment, from soil and water to inside other living beings. They play crucial roles in ecosystems, such as decomposing organic matter, cycling nutrients, and supporting human health. This statistic highlights the richness of life on Earth and the importance of understanding and studying these microorganisms, as they significantly contribute to the planet's biological diversity and overall function.