[Syracuse University] An international team of researchers analyzed manganese and other chemical signatures preserved in more than 27,000 ancient seafloor samples collected from six continents. Across six major glaciations spanning […]
![This illustration contrasts Earth's oceans during ancient glaciations (left) with deglacial conditions (right). Syracuse University researchers found that oceans lost oxygen not just during warm periods, but repeatedly during Earth's deepest ice ages, a pattern preserved in manganese deposits within ancient seafloor rock. (Courtesy: Xubin Wang, generated with AI)-- [Syracuse University]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Metal-deposits.jpg?resize=1200%2C720&ssl=1)
[Syracuse University] An international team of researchers analyzed manganese and other chemical signatures preserved in more than 27,000 ancient seafloor samples collected from six continents. Across six major glaciations spanning […]