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Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Leaf organization Leaf organization
Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind
This debutante is making her formal entrance into society, announcing her eligibility for marriage. ... This debutante is making her formal entrance into society, announcing her eligibility for marriage. ...
Two models of sensory system organization: The former model was hierarchical, functionally ... Two models of sensory system organization: The former model was hierarchical, functionally ...
Organization of the Cerebral Cortex Organization of the Cerebral Cortex
Conservation of organization and patterns of expression in Hox genes Conservation of organization and patterns of expression in Hox genes
Video: Mendel's Pea Experiment

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