Discover the 4 types of ocean sediments, from land dust to space dust, and the secrets each seafloor layer holds about ice ages and Earth's past.
What causes red tide? Learn why harmful algal blooms grow so fast, why they can be dangerous, and how scientists track them.
Plastic in the ocean travels from rivers to the deepest trenches. Learn how microplastics sink, where they end up, and how we can help.