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Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

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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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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.

4 weeks old embryo 4 weeks old embryo
Transcriptome analysis of genes expressed in the sea urchin embryo Transcriptome analysis of genes expressed in the sea urchin embryo
Visualization of gap gene expression in a Drosophila embryo Visualization of gap gene expression in a Drosophila embryo
Stripe pattern of pair-rule gene expression in a Drosophila embryo Stripe pattern of pair-rule gene expression in a Drosophila embryo
Human embryo at successive stages of development (not to scale). Human embryo at successive stages of development (not to scale).
Maternal bicoid patterning of the embryo along the anterior–posterior axis Maternal bicoid patterning of the embryo along the anterior–posterior axis
Video: Hormonal feedback loop components

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