One Tiny Bubble: The Story of Our Last Universal Common Ancestor

Meet LUCA—our Last Universal Common Ancestor, the itty—bitty organism that every unique life—form on Earth can be traced back to. This sprinkle—sized blob was formed from the dust of exploded stars, water, and a lot of heat. LUCA was a single cell that split into two, and these cells multiplied into more organisms that grew and changed. Over the billions of years that followed, the descendants of LUCA ...