![]() ![]() Initially, humans invented the wheel and discovered fire for its usage using tools made of stone, and after some time humans started using metals like copper and the iron to make life easy when humans came to know about its extraction from their ores. In our universe there are around more than quadrillion galaxies(let’s assume about 10% of galaxies in the entire universe are like Milky Way in which life can be supported) and in our Milky galaxy there are about 20 billion stars like our Sun, as per rough estimates there are almost 1/5 of them have an earth-like planet in the habitable zone. Has anyone wondered why we haven’t found any advanced civilization like the present Human civilization in our universe? This kind of question comes to mind is because our observable universe is around 13.5 billion years old and our planet Earth is around 4.5 billion years old. ![]()
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