How big they are: The smallest plants, known as desmids and picozoa, are single-celled algae that are less than 0.0004 inches ...

American chemist Alice Ball revolutionized leprosy treatment by making chaulmoogra oil injectable, decades before antibiotics ...

As a plant ecologist, Alison knew he had to get a sample of the flower. But when he returned to the same spot, a week later, ...

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