The History Channel's new series, "How the Earth was Made," is mostly just scientific enough for me today, as I'm fighting a low fever, and wanted to stare at something educational without spraining too many neurons. Today I sat down with Hulu and watched an episode about the creation of the Great Lakes.
I knew some of it, such as the glacial history, but hadn't known about the igneous origins of the floor beneath Superior and Ontario. The series is presented in steps, giving evidence for theories (with a bit of the History Channel's typical "but that's not all" and "there's more they didn't know," and "but still, mystery remained" drama), then before each ad, recapping the bits. I appreciated those, it helped me knit the story in stages before going on to the next chapter in the story.
As it turns out, I had no idea how fast Niagara Falls was receding. Do you know? What would you guess? Watch the show and see. I was a tad stunned.
(If the Hulu.com video expires, you can find the video for sale at the History Channel website, with a few clips and full episodes still available.)
The Geologic Podcast Episode #542
59 minutes ago