But in Antarctica, some icebergs have a layer of what's called marine ice: ocean water frozen to the underside of an overhanging ice shelf. Marine ice is clearer and darker than glacier ice ...

Getty Images "This isn't just water like we drink. It's full of nutrients and chemicals, as well as tiny animals like phytoplankton frozen inside," Ms Taylor says. As it melts, the iceberg ...

For every bit of the iceberg above the water’s surface, there’s ten times more below, Meijers said. It’s not exactly high-speed action. The iceberg is making its way at a glacial pace of one ...