Why Do Some Animals Get Gigantic?

To learn more about this topic, start your googling with these keywords:

• Spiracles: External respiratory openings on insects
• Carboniferous Period: The time period from 359-299 million years ago when the Earth’s oxygen levels increased rapidly.
• Square-Cube Law: A mathematical principle that describes the relationship between area and volume.
• Buoyancy: An upward force exerted by a fluid that opposes the weight of an immersed object.
• Phytoplankton: Microscopic plants eaten by krill and other zooplankton.
• Baleen: A filter-feeding system inside the mouth of some whales.

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