The BioLogos Forum is pleased to present this infographic about the tools scientists use to determine the age of the Earth. The graphic, titled "How Do We Know the Earth is Old?", uses data compiled and summarized by geology professor Dr. Gregg Davidson.

I find that when many Christians think about the way God created our universe, they often bring a static expectation similar to what we bring to an ordinary statue. It’s as if we assume the physical realm were merely a rigid three-dimensional sculpture, immovable with time.

“That just doesn’t sound right.” Ever since I was a kid, that was my gut reaction to those well-meaning people in my church and school who told me that despite what many in the sciences were saying, the earth and the entire universe were actually of relatively recent manufacture.

In this three part series, geologist Stephen Moshier critiques John MacArthur’s articles on uniformitarianism, while offering an alternative perspective on the principle. He exposes faulty conceptions about and misleading definitions of uniformitarianism. Gregory Bennett further defends the idea of an old earth as Biblical and focuses on the unchanging nature of God. He also discusses the Scriptural doctrines of creation and God’s providence.

Many independent measurements have established that the Earth and the universe are billions of years old. Geologists have found annual layers in glaciers that can be counted back 740,000 years. Using the known rate of change in radio-active elements (radiometric dating), some Earth rocks have been shown to be billions of years old, while the oldest solar system rocks are dated at 4.6 billion years. Astronomers use the distance to galaxies and the speed of light to calculate that the light has been traveling for billions of years. The expansion of the universe gives an age for the universe as a whole: 13.7 billion years old. (Updated April 16, 2012)

In our sixth BioLogos videocast, we take a look at the age of the Earth. We explain four methods scientists have used to determine that age: tree ring, lake varve, radiometric, and seafloor spread dating, and also offer some theological insight on how an old earth can fit with the first chapters of Genesis.

We've recently been looking at the evidence for an old earth and the long history and vibrancy of this view among evangelical Christians. Today’s post features a preview of the updated Question, “How are the ages of the Earth and universe calculated?" revised by Senior Web Consultant and Writer Deborah Haarsma.