Saturn's largest moon may actually be 2 moons in 1 — and helped birth the planet's iconic rings

Scientists now believe Saturn's moon Titan formed 400 million years ago when two massive moons collided, rather than billions of years ago through gradual accumulation of space debris. This dramatic collision may have also created the smaller moon Hyperion from the debris and eventually led to the formation of Saturn's famous rings around 100 million years ago.