All Eukaryotes, including plants, animals, fungi, and algae, share a Common Ancestor called the last eukaryotic common ancestor (LECA). LECA is believed to have lived 1.6 billion years ago and had a complex, multicellular structure with extraordinary features that enabled its descendants to thrive. Scientists are working to unravel the genetic and biological properties of LECA to gain insight into the evolution of eukaryotes. The study of LECA is of great significance in understanding the origins of life and the interconnectivity of all living organisms across the planet.