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Understanding Hormones: the roles of Estrogen and Progesterone

How Estrogen and Progesterone levels affect women. These hormones play a key role in pregnancy and are also present in men.

A Biologist Explains Antibodies through Rap Music

Biologist Raven the Maven explains antibodies through rap music.

An Unexpected Role for the Brain’s Immune Cells

An important part of the brain's immune system, cells called microglia constantly extend and retract "branches" from their cell body to survey their environment.

Understanding Hormones: the role of Testosterone

Testosterone is the main sex hormone found in men. It controls male physical features.. The testes (testicles) make testosterone.