What, according to the author, is "real"? Why does reality become difficult to understand in some cases? What steps or process does the author argue should be taken to establish reality?

What, according to the author, would our ancestors look like at about 186 million years ago? How did they go from what they used to be to what they are now?

Name two ways that a single species can become two separate species, according to the author. Which appears to be the most common way this occurs?

Are atoms really the smallest pieces of matter? Briefly outline the general structure of an atom. What happens to atoms when they connect to other atoms?

Why is it winter in some places on Earth when it is closest to the sun, according to the author? Where do the ends of Earth's axis lie on its surface...