toxic algal blooms
A Warning Sign of a Mass Extinction Event Is on the Rise, Scientists Say
Toxic microbial blooms thrived during the Great Dying, the most severe extinction in Earth's history, and they are proliferating again due to human activity.
The Secrets of a Six Million-Year-Old Whale Graveyard
Hundreds of ancient marine mammal fossils point to four mass strandings in the same place.
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