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Origin and Evolution of Life  
 
Origin and Evolution of Life

Life on Other Planets

Life on Earth

Astronomy and Planetary Sciences Life Sciences What is Astrobiology?
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  Questions about Origin and Evolution of Life
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bullet Hi i just wanted to know about this solar storm (January 23-24). I'm freaking out because they say this is the strongest one in 7 years and I'm afraid of what dangers it causes to us like anything life threatening. I'm really nervous about this.
  Please stop a moment to think about what seems to be frightening you. If this is the strongest solar storm in 7 years, that means there was a stronger one 7 years ago. Did that one cause widespread destruction? Was it life threatening? Is it recorded in the history books as a major disaster? Of ... Click here for more.
bullet My question pertains to the UFO as seen by all astronauts on the Apollo 11 mission. The incident in question is the object seen by Neil Armstrong at 060:45:46 when Neil suspected it might be the S4B, which was not to be the case. A link to the transcript is here: http://history.nasa.gov/ap11fj/10day3-flight-plan-update.htm. Crew comments seem to indicate the "UFO" was not a source point, and that SLA panels cannot be the culprit. The proposed orbital mechanic calcs made by NASA have eluded every attempt I have made to locate them, I would very much appreciate if you would adress this matter as much effort has gone into a serious investigation to get this far. AND What is nasa's official position on the transmission regarding the statement made by one of the astronauts: 'We still have the alien spacecraft under observance'? AND How come you say that there has been no confirmed alien life on the planet when there is hundreds of military footage from country's all over the world.
  I am not an expert on the UFO and alien astronaut movements, but these three questions are typical of those I frequently receive. I can say what I have posted repeatedly in the past, that to my knowledge no U.S. astronaut has ever reported seeing a UFO or alien spacecraft in space. There are at leas... Click here for more.
bullet I know there is a solar radiation storm currently going on, my question is that will we be affected on earth by this storm?? Is it possible to lose electric or power outages in certain areas?
  I am very sad that there are people posting on the web who look at everything in astronomy as a real or potential threat to them. This cosmophobia is a sort of sickness. There are large solar flares about once a month, and they don't hurt anyone. For current information on solar flares and CMEs,... Click here for more.
bullet I understand that you are a scientist and only base what you say on facts. But why do you seem to think it is stupid to think that intelligent life has visited earth before? If we have the capabilities to reach the planets with machines that we have now, who is to say another civilization hasn't already done the same thing or mastered space travel using sophisticated things that we know about but have no idea how to use it?
  There is no evidence of past visits to Earth by aliens. Anyone who bases their conclusions on evidence will conclude that we have no reason to think such alien visits have happened. But are such visits possible? Perhaps. However, the technology required would be far beyond anything we can even i... Click here for more.
bullet In the question, "Have aliens visited Earth? Are UFOs real?", you said, and I quote, "The photos that are posted on the Internet are mostly fakes, and no one has ever produced an artifact or any other tangible scientific evidence of UFOs or aliens." They're MOSTLY fakes? So, you're saying that some are real? I mean, surely, you must have reason behind why you said mostly and not all. And don't go changed your answer. Because you made a conscious decision to put mostly. Thus, changing it would be a conscious decision to get yourself out of explaining the reason that only most of the pictures are fake, and not all of them are. What are you hiding from us, NASA? Whatever it is, I wont let you work your way out of this situation.
  I hesitate to answer such a belligerent question, but I will. And I will try to make the English language clear enough for you to understand. Many "UFO photos" are real pictures of real objects, including planes, birds, balloons, and stars or planets. They are unidentified because the person tak... Click here for more.
bullet My father is a believer of the 2012 doomsday, and I want convince him that its not true. He says the Mayans have predicted that all these events have happened. He saw a show on history channel called decoded that shows everything. He also says that the mayan calendar ends with flooding and that the mayans predicted that the glaciers will have melted to cause this giant flood.
  I can try to help, although I am no expert on the Mayans or the Mesoamerican calendar. There are many people that believe like your father that it is possible to predict the future. We see this in the popularity of astrology, of Nostradamus, of the "Bible Code", and of the "psychics" who can be ... Click here for more.
bullet How come no one explains that the theory of evolution is only a theory and not fact? There is no fossil records of gradual transformation to prove this outdated over 150 years old story of Charles Darwin. Can you coment on Charles Dawson forgery from 1912 of Piltdown Man?
  I would like to think your question is a joke, but I am afraid you are serious. Every statement in your note is wrong. Of course evolution is a fact — it is the basis of all our understanding of biology (including astrobiology). The fossil record is rich with transitional forms. And your statement a... Click here for more.
bullet On December 22 2011 you answered question about extrimaphals, saying that they may exist in temp. -20C to 122C than you added that liquid water is necessary for life to exist, you must know that there is no liquid H2O in -20 C
  The temperature range I quoted as possible for life is very nearly the maximum range in temperatures at which water can remain liquid. Life on Earth requires liquid water. The presence of "antifreeze" chemicals in H2O allows it to remain liquid down to -20 C. And temperatures as high as 122 C are po... Click here for more.
bullet Has the NASA Astrobiology Primer 2006 been updated and re-issued? Has there been any significant advance in the body of knowledge to warrant a re-issue?
  The Astrobiology Primer is in the final stages of revision. We expect the next version to come out early in 2012. The Primer is intended to encompass the foundation of knowledge necessary for astrobiology research. Current research advances may influence that foundation, but much of it is expect... Click here for more.
bullet Can all the continents in the world either sink into the ocean or be cover in water causing all civilizations to end?
  No, nothing of this sort can happen. The continents are a major part of the solid crust of the Earth. There is no way they can sink. The water level in the ocean rises or drops depending on how much of the water is deposited on land in the form of large glaciers. Floating ice makes no difference in ... Click here for more.
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