Podcast:Off the Radar Published On: Tue Jul 18 2023 Description: Blue Holes aren't just a natural wonder, they can also be a portal to the past. Dr. Jeff Donnelly shared with us what they have learned about ancient hurricanes by taking sediment cores from blue holes AND about an unexpected discovery. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.