TED Talk : James Green: 3 moons and a planet that could have alien life

Hi !
I saw a video about the life in our solar system.
For his development, life need three elements: water, energy and organic chemistry. Scientists try to find other place than Earth combining their elements. Before Earth, it's to hot and after Mars, it's too cold. So they observe the planet Mars and three moon. But today, we don't discover life on their place. Since 2014, scientist try to learn if life had exist in the past. The robot Curiosity has been sent to dig the surface of Mars. Scientist found elements for life development like carbon, hydrogen or oxygen. They observe crater with black light and after study them they discover that the crater of Mars contained water.
They find ice on saturn's moon. But for have ice you need water. What is the origin of this water ? Hydrothermal vent like we can find on Earth's ocean.
On Titan, an other saturn's moon scientist saw a kind of black lakes on the surface. For them, if an other kind of life can develop, it's on Titan.
For James Green, we're on the right track for discover life in our solar system and in ten year we'll be able to tell if life had exist, exist or can exist or not somewhere else than Earth.