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April 05, 2019

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Top 10: Controversial pieces of evidence for alien life

Top 10: Controversial pieces of evidence for alien life 1. 1976, The Viking Mars landers detect chemical signatures indicative of life Tests performed on Martian soil samples by NASA’s Viking landers hinted at chemical evidence of life. One experiment mixed soil with radioactive-carbon-labelled nutrients and then tested for the production of radioactive methane gas. The test reported a positive result. The production of radioactive methane suggested that something in the soil was metabolising the nutrients and producing radioactive gas. But other experiments on board failed to find any evidence of life, so NASA declared the result a false positive. Despite that, one of the original scientists – and others who have since re-analysed the data – still stand by the finding. They argue that the other experiments on board were ill-equipped to search for evidence of the organic molecules – a key indicator of life. 2. 1977, The unexplained extraterrestrial “Wow!” s

Is Time Travel Possible? What Says Stephen Hawking By Technologypk

Is Time Travel Possible? What Says Stephen Hawking "If one made a research grant application to work on time travel it would be dismissed immediately," writes the physicist Stephen Hawking in his posthumous book Brief Answers to the Big Questions . He was right. But he was also right that asking whether time travel is possible is a "very serious question" that can still be approached scientifically. Arguing that our current understanding cannot rule it out, Hawking, it seems, was cautiously optimistic. So where does this leave us? We cannot build a time machine today, but could we in the future? Let's start with our everyday experience. We take for granted the ability to call our friends and family wherever they are in the world to find out what they are up to right now . But this is something we can never actually know. The signals carrying their voices and images travel incomprehensibly fast, but it still takes a finite time for those signals t

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