How are you today?

[Ibex]

I am wonder who said this.

The Dark Matter thing? Or that our body makes cancer cells all the time?

The Dark Matter thing was in ep 1 or 2, most likely ep 1. Since it was the introduction of one of the characters.

I heard the cancer cell thing on a documentary on tv.

Sorry if I've scared a few people with this info.
But you should know how your body works, so that you can help it.
Exercise is very important.