Taking the seagrass taxi: How foraminifera move from the coast to the depths of the Red Sea
Foraminifera are single-celled marine organisms with a calcareous shell. They not only provide evidence of past habitats, but ...
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Science: Oldest Life
In a layer of flint beneath an iron ore deposit in Ontario, they identified two kinds of algae, two of fungi and an organism that they believe may be a calcareous (containing calcium) flagellate.