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This interactive module explores how different animals — elephants, birds, and bats — have evolved distinct ways of using sound to communicate.

This interactive module explores key human impacts on the environment and how they have affected Earth’s landscape, ocean, atmosphere, and biodiversity.

This interactive module explores the circulatory systems of major vertebrate groups to gain insights into their evolution.

This tutorial describes the symbiosis between the Hawaiian bobtail squid and bioluminescent bacteria.

This interactive, modular lab explores techniques for identifying and recording the electrical activities of neurons, using the leech as a model organism.