Rare Evolutionary Event Unfolds as Two Lifeforms Merge into Single Organism

Discover the extraordinary event of primary endosymbiosis, where two distinct lifeforms merge into a single organism, marking a significant leap in evolution. Learn how this rare occurrence has shaped life on Earth, with examples like mitochondria and chloroplasts, and how researchers have now observed a new fusion between Braarudosphaera bigelowii and UCYN-A, offering insights into the development of new biological functions and adaptations.