We Might Not be the First: Complex Life Could Have Existed on Earth at Least Once Before

Complex life might have come and gone on Earth long before the multicellular organisms we’re familiar with today arose, a new study suggests. It’s generally thought that the evolution of complex life was a rare, once-in-4.5-billion-years event. But new research suggests that conditions were right for complex cells to evolve and die off at least once – or perhaps several … Continue reading →