Here is wonderful infographic on how we know the earth is old, brought to you by the folks at Biologos. The original article is here. I love it when people can take technical, scientific info and make it understandable to a 7-year-old (which is where I’m at mentally, sometimes).
The graphic, titled “How Do We Know the Earth is Old?” uses data from the National Center for Science Education, Tufts University, Tulane University, and numerous other sources, and was compiled and summarized by Dr. Gregg Davidson, Professor in the Department of Geology and Geological Engineering at the University of Mississippi.
Angelica Asher 