Question

1. For the last many decades, people have been mystified about the presence of aliens. Efforts have been

made to solve this puzzle because this will get us a step closer to discovering if Earth is the only planet to

support life. If is difficult to know if extraterrestrials exist, unless they get in touch with us or we find some

evidence of their existence. Scientists do not rule out the possibility of life in the form of bacteria or other

microorganisms, rather than intelligent human beings. But the search continues.

2. NASA captured images of Mars and they revealed that the Red Planet is somewhat like Earth—it is likely

to have had water at some point in its ancient history. Some stargazers claim to have seen aliens there.

However, scientists do not support these claims. It is believed that Mars was frozen once upon a time-a few

billion years ago. The surface of the planet melted, and this resulted in the creation of deep valleys and

canyons on its surface.

3. Scientists believe that there could be bacteria on Mars that bear resemblance to the simple microbes that

exist in the ice-bound lakes of Antarctica. Scientists believe like Earth, Mars too was struck by huge

asteroids, sending fragments of both these planets into space. Scientists think that the discovery of life on

Mars could help us understand how life first began on Earth.

4. Alfred McEwen, professor of Planetary Geology at the University of Arizona, said: the search for ancient

life on Mars may really be the search for the origin of life on Earth’. The samples collected by NASA’s

Mars Rovers have detected complex organic compounds on Mars. Professor McEwen feels life probably

still survives there in pockets below the surface where it would be warmer and that the microbes were

sheltered from cosmic radiation. This raises an interesting question-Did life originate on Earth and get

transported to Mars or was it the other way round?

Answer the following questions very briefly:

1. Why has there been a mystery surrounding aliens?

2. Why have scientists been trying to solve the mystery?

3. Why is it difficult for scientists to know the truth?

4. What kind of life do scientists expect on other planets?

5. Why is the possibility of life on Mars not ruled out?

6. What are the indications of water on Mars?

7. What is the similarity that the scientists see between Earth and Mars?

8. How will finding life on Mars help us?​

Answer 1

Answer:

Explanition

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