Did you watch TV last night, Rose?
Yeah. I saw a science program. It was quite interesting.
What was it about?
Mars. Scientists say there might be water on it.
If so, we may live there someday.
I hope so. Did you know the US successfully sent two robotic explorers to Mars last month?
Sure. I heard about this on the TV. On January 3rd , 2004, Explorer Spirit landed near the so-called Gusev Crater. And three weeks later, Spirit's twin explorer, Opportunity, landed on Meridiani Planum named by scientists.
Yes. Both have sent back pictures of the planet. And the latter did a better job.