“Ice Age Mars” –Challenges a Once ‘Warm and Wet’ Red Planet

  “Mars once was wet and fertile. It’s now bone dry,” said Cosmos host, Neil deGrasse Tyson, “Something bad happened on Mars. I want to know what happened on Mars so that we may prevent it from happening here on Earth.” Mars is crisscrossed with distinctive tracks of big, long-dead rivers but scientists still don’t … Continue reading “Ice Age Mars” –Challenges a Once ‘Warm and Wet’ Red Planet