There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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There are more bacteria in your mouth than there are people in the world.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Structure of the DNA double helix
The structure of the Sun
Vienna: Social Structure and Social Interaction
Structure of phosphate ion and hybrid atomic orbitals of phosphate ion