A NASA scientist states: I know where the aliens are hiding on Earth - voila! Technology. A former NASA scientist and alien expert said aliens already roam the Earth, but they may be hiding in an unexpected place.
According to him, they are in the place where the temperature is most comfortable for them and it is easiest for them to hide. Guess where? The ocean. The temperature and other conditions suitable for alien life could be beneficial to creatures already hidden underwater. The vastness of the earth.