What is the earth circumference around the equator.

Which of the following is evidence to the past existence of glaciers?

Lines of longitude are like stripes from the top of the globe down to the bottom virtually slicing the earth like an orange

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.