again in the hope that we might come across other intelligent species in our universe. Astronomers who are part of this program are of the view that an active approach is likely to yield better results in contacting an alien civilization than scanning our skies for signs of life elsewhere. In 1977, the Big Ear telescope at Ohio State University received a powerful burst of radio waves that lasted a minute and 12 seconds.
This is regarded as the best candidate signal we have received after the Search for Extra-Terrestrial Intelligence program began over 60 years ago. Over decades, researchers have tried to study the signal and its origins in further detail and an amateur astronomer, While Caballero published his findings in the International Journal of Astrobiology earlier this month, the amateur astronomer has some other works to his credit too.
By Caballero's calculations, the number of civilizations that could possibly invade us is four and this is two orders of magnitude lower than being hit by a giant asteroid that could potentially kill the planet. Caballero's estimate suggests in terms of technological progress these four civilizations could actually be more like the
, and mathematically, there is lesser than one civilization that is actually capable of interstellar travel that would be needed for an invasion. The student of conflict resolution also suggested that as societies advance, they are less likely to engage in conflict, and he makes an assumption in his estimate that anwill also follow the same behavior that he has found on Earth. This might prove false as well.
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