When you visit a pond or the beach, you might see fish, frogs, crabs, insects, seaweed, or lily pads. Don’t let your eyes fool you, though… there’s a hidden world in water full of creatures too small to be seen!
Little water, sweaty, hot summer days and frigid winter nights make the desert an uninviting place for most animals and plants. But hiding just below the surface, the desert is alive with microbes—tiny, living things too small to see without magnification.
Every second of every day the brain is collecting and sending out signals from and to the parts of your body. It keeps everything working even when we are sleeping at night. Take a tour of this amazing control center.
Does brain size relate to intelligence?
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