![Matt Kohn, Allison Corona photo.](https://www.boisestate.edu/news/wp-content/uploads/sites/164/2018/12/D_1812_027_001_update-339x500.jpg)
Matt Kohn, a distinguished professor of geosciences, presented the three-session course, “The Age of the Earth” to more than 100 Osher Lifelong Learning Institute members from Feb. 1-15. The course examined estimates of the age of the Earth from early history to present day, including pre-scientific views from ancient cultures, the first scientific estimates based on cooling rates of hot spheres, the great evolution debate and more.