NASA is scanning the space on a continuous basis and no radio signals have been intercepted yet from other planets. There could be many possibilities..
- We missed the radio signals sent by aliens as we started scanning since a few years
- No higher form of life exists anywhere but there may be lower forms of it existing
- No life exists except on earth
- Signals may be on the way..might take many years to come to earth
- Life may have existed earlier and now the planet may have been heated by the nearby star turning a red giant
After all, intercepting radio signals from any other planet or moon in the universe sitting on earth is like scanning the oceans trying to locate your lost ring.
NASA is scanning the space on a continuous basis and no radio signals have been intercepted yet from other planets. There could be many possibilities..
- We missed the radio signals sent by aliens as we started scanning since a few years
- No higher form of life exists anywhere but there may be lower forms of it existing
- No life exists except on earth
- Signals may be on the way..might take many years to come to earth
- Life may have existed earlier and now the planet may have been heated by the nearby star turning a red giant
After all, intercepting radio signals from any other planet or moon in the universe sitting on earth is like scanning the oceans trying to locate your lost ring.