““What did happen to Mars, anyway? Our next door neighbor, the Red Planet, apparently was once covered with flowing rivers. What happened to them? Rivers suggest an atmosphere. Where is it? Was Mars once a vital, thriving planet? If so, why does it now appear dead? Could a lifeform on its surface have proliferated so abundantly and so recklessly that it altered the planet’s atmosphere, thereby knocking it off-kilter and destroying it? Is that what’s happening to our own planet? Will it be our legacy in this solar system to leave behind another lonely, dead rock to revolve around the sun? Or will we simply destroy ourselves while the Earth, stronger than her Martian brother, overcomes our influence and survives to flourish another billion years — without us?””
