Alien art
My picture above is showing that an alien bird is picking up a leaf.
Development of some aliens from an animal stage to a developed stage ( at tree of life) might take very long time or the expected development might not happen at all if some components don't come together.
The environment, the world they are in, might not be very rich for the development of the aliens, and/or biological development might head in a very different direction. Their "tree of life" might not have proper branches for a progressive development. The tree would be weak, like a tree in a desert.
For a chemical reaction, we have to have specific atoms. We need substances to create other substances. For reactions to happen, we have to have some conditions present at the place where the reaction should happen.
Already developed aliens would be the lucky ones, passing all hurdles. When we consider the existence of billions of stars, planets and a lot of different places within planets in our universe, the probability would be very hight to be lucky for some aliens.
Another issue is that we might not see any alien at all because of the distance between stars and galaxies. Non of us ( we and aliens ) might reach the very high development to create very high technology to fly that far ( the distance between galaxies getting more in each day, expanding universe ) before our universe collapse, before the black holes pull the galaxies, before the stars of the planets explode, before the artificial intelligence takes over ( AI doesn’t need to be conscious and alive, and doesn’t need to have feelings and emotions. it can survive on its own if it is programmed properly ), etc.
Al might be the biggest threat to humans and aliens, it could wipe out them very easily. The creation of very destructive Al is possible when we consider how much hatred there are in our world between nations, races and between the people with different religions.
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