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How life has evolved into a multitude of sizes, ranging from microscopic bacteria to the 110-foot-long blue whale; scientists are learning how the struggle for survival has led some animals to become small and others to get huge.
How humans' ability to communicate has defined them as a species; sharing information helps humans rise to the top of the food chain and dominate their environments; bacteria; fish; insects.
The evolution of deadly venom in insects, jellyfish, snakes and even mammals; how evolution has adapted venom to fit animals' needs; pound-for-pound the cone snail is the most toxic creature in the world.
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