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September 1, 2026 6:00 AM
Use these free STEM lessons and activities to talk about habitats, ecosystems, food webs, and more as you explore biodiversity with K-12 students. Biodiversity, the "biological diversity" of our planet, is key to human survival. There are an estimated 8.7 million species of plants and animals on Earth, but biodiversity is more than just a count of how many different types of plants and animals (species) exist in an area or on the planet.… Read more
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Free science fair projects.