Which of the following is a good summary of what most astronomers think about UFO reports? Group of answer choices   It is now clearly established that alien spacecraft have crashed on Earth; we have the bodies of the aliens who flew them here.   UFO's have kidnapped a number of Earth inhabitants, including at least one well-known astronomer; her reports convinced other scientists that UFO's are indeed alien spaceships.   While no UFO's have landed, we have overheard communications between them with our radio surveys and thus have evidence that there are intelligent creatures aboard them.   UFO's are now known to come from the planet Mars, the only other planet that we know has life on it.   There is currently no scientific evidence that UFO reports have anything to do with life outside the Earth.

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Which of the following is a good summary of what most astronomers think about UFO reports?
Group of answer choices
 
It is now clearly established that alien spacecraft have crashed on Earth; we have the bodies of the aliens who flew them here.
 
UFO's have kidnapped a number of Earth inhabitants, including at least one well-known astronomer; her reports convinced other scientists that UFO's are indeed alien spaceships.
 
While no UFO's have landed, we have overheard communications between them with our radio surveys and thus have evidence that there are intelligent creatures aboard them.
 
UFO's are now known to come from the planet Mars, the only other planet that we know has life on it.
 
There is currently no scientific evidence that UFO reports have anything to do with life outside the Earth.
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