Scientists challenge the idea that intelligent life is rare. They argue that evolution follows planetary changes, not random luck.

For decades, scientists have debated whether humanity’s existence is a rare cosmic accident or the natural outcome of planetary evolution. A new study challenges long-standing assumptions, suggesting that intelligent life may be an expected result of planetary development rather than an improbable occurrence.

For decades, scientists assumed that life on Earth emerged through a chain of highly improbable flukes. But a new theory suggests it may have instead arrived just in time.