Suppose, scientists are going for a planet explorations:-
- 10, 9, 8, 7, 6, 5, 4, 3, 2
- 1, BOOM
- Crossing the outer Atmosphere
- Stage 1 detach.
- Stage 2 detach.
- Moving through interstellar space.
- Reaches the outer Atmosphere of the planet where scientists are going to explore.
- Lands with a parachute (hard landing).
- Rover comes out of lander to see what's there.
Images source: Mars mission on Nationalgeographic.com
AND
A living creature comes out of nowhere infront of the rover, which scientist weren't able to see through any telescope or technique from Earth.
What would happen?
We are searching for life on different planets in this universe. There are billions of galaxies in Universe and in those billions, we are living in one Galaxy.
In that Galaxy, we have a solar system in which we are trying to find and searching for life on Mars to live in future.
We have seen Mars from camera and trying to send Humans on Mars in future. Similarly, scientists are exploring other areas of Galaxy to find a suitable planet to live in.
What if, we find a suitable planet and those living creature are much much more advance than us?
What if, they track us down through those signals and instead of searching for life, we end up losing all the remaining?
Yes, it's only a possibility.
BUT
Who knows, what could happen in future anytime soon!