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Man-eating Spiders

Man-eating spiders! Martha tells a charming story about how illustrators and authors work together when they make children’s books. This is part of a complete episode.

Hilltopping

Hiking in the mountains, Martha kept noticing butterflies at about 4,000-to-5,000 feet above sea level. Those butterflies are hilltopping. It’s when male butterflies of many species go to high points to advertise their fortitude and genes to the...

Polar Words

A conversation with a leading expert on polar bears has Martha thinking about several bear-related words, including the term arctic and the feminine name Ursula. This is part of a complete episode.

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