Rodinia was a supercontinent that existed during the late Proterozoic era, approximately 1.3 billion to 750 million years ago. It is believed to have formed through the collision of several smaller landmasses and was one of the earliest known supercontinents in Earth's history. The breakup of Rodinia led to significant geological and biological changes, paving the way for the development of complex life forms. Its fragmentation contributed to the formation of modern continents and influenced ocean circulation patterns, which played a crucial role in the evolution of life on Earth.