No planet will have a complex form of life that popped into existence all on its own. Whatever life is like on an alien planet, it must have begun simply. But if life is to achieve any kind of complexity, the only way that complexity can accumulate is if favorable changes and innovations are retained and unfavorable ones are lost.
PTELook at the text below. In 35 seconds, you must read this text aloud as naturally and clearly as possible. You have 35 seconds to read aloud.
Recorded Answer
Current status:
Beginning in 35 seconds.