False it can be but it doesn't absolutely have to be
Answer:
Diversity: When many different ideas/opinions/races/religions etc. are present.
Equality: The right of different groups of people to have the same rights and be treated the same.
Inclusion: The act of including something as a part of skmething else. Also the idea that everyone should be able to use the same facilities and enjoy the same experiences, no matter race/religion/disability or other minority.
Discrimination: Purposefully treating a group of people differently (and worse) because of their race/sexual identity/sexuality/religion etc.
Answer:
Because a lot of things have not yet been discovered and questioned as well as there being billions of things that we have absolutely no knowledge about.
Is life that exists only off our planet,
No aliens have been seen/found yet, but it is a strong theory as the universe is very large.