Harrison leaches about the deepest abyss in the ocean and how animals have adapted to live there.
Harrison learns that not all sharks are dangerous to humans and why their teeth are not as big as they used to be.
Harrison learns why Earth is called the Blue Planet and how to calculate the size of the oceans.
Harrison explains the history of sea monsters.
Harrison sings a song about the real monster in the sea and teaches about the importance of keeping the ocean clean.
Harrison learns why a lemon floats, but a lime doesn't. Two kids are challenged to create something that floats out of a ball of clay.
Biologist Adam Brown teaches Harrison how salt water and fresh water fish 'drink' using osmosis.
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