Hi Everyone! I used to have a book that explained physics concepts quite simply. I used to read it when I was about 8 or 9 years old and one chapter really stuck with me (I'm 25 now). I'm not sure where the book went, and have been looking for it for some time and think this might be the best way to get an answer. I don't remember the author either. I'll post what the one chapter was about and hopefully someone knows what book it is. Some details about the book in general first: I remember it had lots of basic illustrations, as in something like pencil drawings and basic figures. It was a smaller book and not very thick. I think it was red, but could be mistaken. I also am not sure when it was published, because it's possible it was my mom's book or my brother's (who is older). So essentially, it describes two types of people that are both immortal. They have infinite time and I think they had infinite space to explore as well. So the two types differ in that one type is the type to do everything and explore everything as fast as possible and the other type does it very very slowly taking their time. That's what I remember. Thanks for the help!