From cell to civilisation took about 4 billion years, which is a long time—a third of the age of the universe. If it takes billions of years to produce complex living things at our level, maybe there aren’t many places that could sustain an unbroken chain of life for that long.
Brian Cox — From cell to civilisation took about 4 billion years, which
From cell to civilisation took about 4 billion years, which is a long time—a third of the age of the universe. If it takes billions of years to produce complex living things at our level, maybe there aren’t many places…