Meaning: There could be living beings on other planets or in space.
Choice of Words: Aliens, might, exist, somewhere, out, there.
Alternative Expressions
There could be aliens out in space.
Meaning: This means that it's possible that creatures from other planets exist in the vastness of space.
Choice of Words:Could is similar to might and means that something is possible. Be is a verb that means to exist. Out means away from a specific place. Space refers to the vast area beyond Earth's atmosphere.
It's possible that extraterrestrial life forms exist beyond our planet.
Meaning: This means that it's not certain, but it's possible that living beings from beyond our planet exist in the universe.
Choice of Words:Possible means that something can happen or be true. Extraterrestrial means from outside Earth. Life forms are living things. Beyond means farther than a specific point.