About 66 million years ago, a 9 km wide asteroid killed 75% species on Earth. Today a similar event can happen anytime and we don't have any options to defend ourselves. We have sent probes to different planets in our solar system but not found any hospitable places to live or move. The nearest star Alpha centauri system is 4.3 light years away and will take 70000 years to reach this star at the current maximum travel speed of 17 metres per second. When we look at cosmos, it's so big that life could be there everywhere but looks like there is no advanced civilization in our vicinity may be in our entire Galaxy. Something resets life may be every few million years and ours may be due anytime, surely we are running out of time..
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