Curiosity is a important characteristic of the human being, fundamentally in scientific activities. It is what lead us always to discover and comprehend more about how the universe works.

Was said once by Carl Sagan, in his book "A Pale Blue Dot": "there is no hint that help will come from elsewhere to save us from ourselves." Until the present moment, our planet it's the only comproved place able to harbor life. We must watch for him. We must preserve.