Lots of information came from books and Wikipedia. I know people say Wikipedia isn't good because anyone can edit it, but no one is spreading propaganda/misinformation on the wikipedia page of a gigantic insect or a proto mammal. I also used the BBC documentary, Walking With Monsters, as a source of information. Note: Wikipedia, Walking With Monsters, and my memory might be a bit outdated, so don't send me death threats if something is inaccurate.

IMPORTANT NOTICE: Some of the information may be inaccurate.

I am sorry, but there really isn't much I can do about it. I am not going to go visit a paleontologist to get facts for a website. Also, some of the fossils may be misleading, meaning what is currently accepted as true may be wrong. For an example, people once thought that dinosaurs were quadrupedal, cold-blooded reptilian brutes, who were too dumb and lazy to survive. Now we know that dinosaurs were feathered, warm-blooded, swift creatures that some people argue are not reptiles. More on that in Info about Things.