Life on Other planets. Essay -- essays research papers

One of the most common unanswered questions scientists find themselves asking is "Is there life on other planets?" Since the first famously documented UFO sighting in 1947, the idea of extra-terrestrial life has been debated almost non-stop. The subject has inspired many TV programs, such as The X-Files, and films (Mars Attacks, Independence Day, and the Men in Black films to name but a few). Scientists have come up with many new ideas and ways of trying to either prove or disprove the existence of life elsewhere. Mars is a very similar planet to earth in relation to size and atmosphere. Therefore it seemed like the most likely place to search for life. At the end of the 19th century, an American named Percival Lowell built himself an observatory so that it was possible for him to study Mars in intimate detail when its orbit was closest to Earth. At this time it had recently been suggested that the planet had a system of channels on the surface, present from the evaporation of flowing water. Looking through his telescope Lowell became convinced he could see a network of artificial canals. This led him to believe that there were intelligent beings on Mars who had built these canals. However, spacecraft have now visited Mars and found that there is no evidence of water at all. It is now thought that the lines he could see were the combination of Lowell's overactive imagination, and scratches on the lens of his telescope. We are now searching one of Jupiter's moons, Europa, as this seems to be th e next likely place to hold life. It is seen to be more likely, however, that we will find less intelligent life in one of two different ways: It may be possible for us to obtain material from another planet or moon or star from elsewhere in the Solar System. Spacecraft may be able to visit these bodies and, for example, use a robot to collect material for examination. This may be examined on site, or brought to Earth to be investigated in laboratory conditions. They could be tested for things such as evidence of fossilised organisms. Another, possibly slightly far-fetched hope is that we may find simple organisms like bacteria actually living on the desired planet. These ideas spanned from the discovery of rock on our planet that originated from Mars; knocked from the planet when a comet collided with it. In 1996 a group of scientists created conflict by ... ...them is so great that they are dragged to our planet. Another idea is that UFO's are not really from other planets at all, but created right here on Earth. Supposedly Germans, Americans and Soviets started the 'Projekt Saucer' in Germany towards the end of World War II. During the war Germans sent ships to the Antarctic with equipment and plans for a massive underground structure. It is said that at the end of the war scientists and engineers who had been working on Projekt Saucer in Germany ended up in this underground structure, where even more advanced saucers were created. In a manner of thinking this is by far the scariest theory should it be proved correct, for it brings up more questions than it gives answers. What would people on Earth want to create spaceships for? Why keep it such a secret if everything is harmless? Maybe, if this theory is proved correct, it is better not to know the answers. To conclude, there are no solid facts on the existence of extra-terrestrials. Whether or not they exist will, until definite proof is brought forward, be a topic of major debate. Personally I believe that there is something out there-although what it is I wouldn't hazard a guess.