Question

Is aliens are there​

Answer 1

Answer:

Due to the report of NASA they found aliens in their report and they advised to be safe from aliens attack on earth in future

Answer 2

All of those exoplanets would be capable of sustaining Earth-like life, so the equation assumes from 1 to 5 in any system could. Of those bio-friendly worlds, from 0% to 100% would actually go on to develop life. And of those world, in turn, from 0% to 100% would develop life forms that we would consider intelligent.

The mere existence of intelligent life forms tells us nothing, however, unless they have the ability to make themselves known—which means to manipulate radio waves and other forms of electromagnetic signaling. Drake estimates that from 10% to 20% of the smart civilizations would clear that bar.

Finally, and perhaps most anthropocentrically, the equation considers how long any one of those semaphoring civilizations would be around to blink their signals our way.