Winemaker Gustav Heineman discovered the largest geode, filled with celestine crystals and measuring over 10 meters across, on South Bass Island, Ohio, in 1897. The geode formed during the Silurian period, around 430 million years ago, when glaciers melted at the end of the last ice age. Lake Erie water seeped into anhydrite pockets, dissolving them and creating caves.
Related Posts
The Mystery of Zabargad Island
Discover how the mysterious island of Zabargad, in the Red Sea, came to be, its significance in ancient…
We developed a way to use light to dismantle PFAS ‘forever chemicals’ – long-lasting environmental pollutants
PFAS can contaminate the environment – their chemical structure makes them difficult to remove. George Pachantouris/Moment via Getty…
Why Parkinson’s Cases Are Surging—and What’s Causing It
Parkinson’s cases are soaring worldwide, and mounting evidence points to pollution, pesticides, and industrial toxins, not just aging, as key drivers behind the surge.
Despairing about climate change? These 4 charts on the unstoppable growth of solar may change your mind
Shutterstock Andrew Blakers, Australian National University Last year, the world built more new solar capacity than every other…