this may be the first sign of other life that appears to exist beyond earth...
btw, I believe there is another life beyond the earth but our technology is still not able to reach them. I have the principle that in this vast solar system it is not possible only on earth to have life.
The "first sign" was some asteroid that came from Mars with alleged fossil prints. Its only a matter of time for more evidence to come from there from the many missions ongoing and planned. Venus was actually unexpected, but then again what could we possibly know about life in the universe?
Studying Venus is difficult due to the planet's environment, but i suspect more probes will head there to investigate about those interesting readings.
Your "principle" sounds a lot like the
Fermi paradox, but i wouldn't limit the scope to this mere solar system.
Also don't forget the Solar System has 8 planets, and a whole bunch of satellites and dwarfs (and the asteroid belt, possible remains of planet. After Neptune the next celestial object is called Eris, yes, you read that right, Pluto comes after Eris. The solar system is incredibly huge, but its but a grain of sand in the vast universe. Earth would by like a sub atomic particle or something.
The moon is "meh" but several countries are visiting because its "close". Even Israel tried but couldn't quite brake properly and left a bunch of debris on its surface. I guess they'll try again later. If you want the best pictures of the moon, look at the Chinese Chang'e probes. Even SpaceX is planning to send tourists to fly by it. NASA is also revisiting, for some reason.
There is no problem with determining "habitable zones" in the solar system, but they will be defined not as planets or moons, but areas within those. For example, certain areas high in the atmosphere of Venus. Certain depths in the oceans of Europa. Likely, specified areas under the surface of Mars. So forth and so on.
The Moon is unique in that it has no habitable zones, but an incredible variety of metals and elements ready to mine and use right on the surface. It is the supply depot of Earth for solar system exploration.
