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Sodium Channel Evolution in Electric Fish

This activity guides the analysis of a published scientific figure from a study that investigated how gene duplication contributed to the evolution of electric fish.

Sex Verification Testing of Athletes

This interactive module explores the biology of sex determination and development in humans, set against the backdrop of the different sex testing policies implemented throughout sports history.

Sleep Clears β-amyloid from the Brain

This activity analyzes a published scientific figure from a study that investigated the biological importance of sleep. In this study, scientists tested whether sleep plays a role in removing harmful substances from the brain.

Cone Snail Toxins and Paralysis

This animation shows how cone snail toxins cause paralysis by blocking signal transmission at the synapse between neuron and muscle.

The Cochlea

This animation illustrates how the human cochlea, a structure in the inner ear involved in hearing, receives sound in the form of vibrations.