- http://www2.estrellamountain.edu/faculty/farabee/BIOBK/ediacaran.gif = picture in the precambrian time
- http://3.bp.blogspot.com/-bGzlWcUd7bw/UKGvC7MdTRI/AAAAAAAAR4c/nv6glUYGEW8/s1600/Uncle%2BMilton%2B-%2BIn%2BMy%2BRoom%2B-%2BEarth%2BIn%2BMy%2BRoom%2B-%2B2.jpg =main image of the Earth
- http://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/NumbersBookCover.svg/450px-NumbersBookCover.svg.png =the number picture
- http://www.corzakinteractive.com/earth-life-history/assets/scenes/412a_ordovician.jphttp:// =the paleozoic era picture
- http://www.10dayloop.com/images/appalachian_mountains/appalachian_mountains_0.jpg =Appalachian Mountains picture
- http://earthshistoricalcatastrophes.weebly.com/uploads/1/9/4/5/19456227/344851317.jpg = the Mesozoic picture
- http://images.nationalgeographic.com/wpf/media-live/photos/000/606/overrides/lucy-afarensis-tree-climber-reconstruction_60608_600x450.jpg = the Lucy picture
- http://3.bp.blogspot.com/-Y3L57hdPnUU/Thuql9_jbqI/AAAAAAAAAJs/l2dP6rlRWq8/s1600/2004_gallery_pliestocene.jpg = the Cenozoic picture