Karen Henker’s informative talks educate and entertain. You can see it’s not a job but a joy and a calling. Even information I was aware of seemed presented a new way, because of her delivery. The videos are quick, informative, and keep you interested. Perfect when your too tiered to concentrate on new worlds.

An attractive presentation describing fundamental processes that have been at work shaping the Earth since it's formation 4.5 BIL years ago. I enjoyed this.