To qualm is to feel a sense of hesitation or fear. You might qualm about doing something because you are not sure if it is the right thing to do.
To annihilate something is to completely destroy it. If you annihilate a city, you completely destroy it.
A superhuman is a person who is able to do things that are beyond the abilities of most humans. Superhumans can be very powerful, and they often have special skills.
Intuitions are the thoughts and feelings that you have without any evidence. Intuitions can be about anything, from the color blue to the idea that the world is round.
To describe something as drudgery is to say that it is a very difficult and unpleasant task. When you say that something is drudgery, you are usually referring to work or something that you have to do.
Overpopulation is when there are too many people in a particular area, and it is causing problems. There is not enough space to live, and the resources that are available are not being used efficiently.
A mothership is a large spacecraft that is used to ferry people and supplies to other planets. The mothership is often a huge, complicated machine that is difficult to control.
The limbic system is a part of the brain that is responsible for emotions and instincts. It's also the part of the brain that is most active during sleep.