[speaker001:] Did you watch TV last night, Rose?
[speaker002:] Yeah. I saw a science program. It was quite interesting.
[speaker001:] What was it about?
[speaker002:] Mars. Scientists say there might be water on it.
[speaker001:] If so, we may live there someday.
[speaker002:] I hope so. Did you know the US successfully sent two robotic explorers to Mars last month?
[speaker001:] Sure. I heard about this on the TV. On January 3rd, 2004, Explorer Spirit landed near the so-called Guser Crater. And three weeks later, Spirit's twin explorer, Opportunity, landed on Meridian Planum named by scientists.
[speaker002:] Yes. Both have sent back pictures of the planet. And the latter did a better job.