So what is the future of the exploration of Mars? In 2014, the first return flight is planned, which means that a space probe will bring back to Earth samples of Martian rock and soil.After that, there might be the first crewed flight to Mars. At the moment, a manned mission to Mars is right at the edge of our exploration abilities. There are many problems because of the length of the return journey which would take about two years. But a manned flight could explore the planet further and even analyse the possibilities for human settlement on the planet. Who knows? Maybe our grandchildren will be living happily on the Red Planet. To sum up,in many ways Mars is our new frontier Now that we have explored our own planet, this beautiful, mysterious, red planet remains open to us. Let's just hope that we don't make such a mess of it as we have done of Planet Earth. That's all,thank you.
文本來源于在線英語聽力室