We go to learn about our solar system, to search for life, and to understand what happened to Mars so we avoid… — Rick Tumlinson Copy Share Image
Mars once was wet and fertile. It's now bone dry. Something bad happened on Mars. I want to know what happened on… — Neil deGrasse Tyson Copy Share Image
Something bad happened on both Mars with its dried-up watercourses and Venus with its runaway greenhouse effect. Could something bad happen on… — Neil deGrasse Tyson Copy Share Image
