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  • Frogs are a species of amphibian. In recent years, there has been a decline in the numbers of amphibians worldwide.…
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    As the Frog Hops: What Routes Do Frogs Travel in Mountain Environments?

  • Cutthroat trout are a type of salmon. The scientists in this study wanted to find out if cutthroat trout behave…
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    Big Fish in a Small Pool: Habitat Preferences of Cutthroat Trout

  • Cutthroat trout are a type of salmon. The scientists in this study wanted to find out if cutthroat trout behave…
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    Big Fish in a Small Pool: Habitat Preferences of Cutthroat Trout (Spanish)

  • Help Busy Bee complete each statement by filling in the blanks for missing words. Use what you’ve learned about watersheds,…
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    Busy Bee Word Challenge – Full Throttle Model

  • Many changes have occured in the Rio Grande since the 1940s that have created a river that is deeper and…
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    By the Light of the Silvery Minnow: Can Young Minnows Be Taught About Their Natural Foods?

  • A world of wonder awaits just below the surface, and this distance learning adventure explores these amazing places. Specially adapted…
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    Caves LIVE

  • Test your knowledge on alluvial soil, watersheds, and fish.
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    Crossword – Food for the Soil

  • If the temperature of a stream rises too high, the animals that live in the stream may find it difficult…
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    Did They Make the Gradient? Climate and Stream Temperatures Now and Into the Future

  • From 1920 to 1950, a tree species called albizia (Falcataria moluccana) was brought to Hawai‘i from islands located north and…
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    Don’t Litter the Stream: An Invasive Tree Species and a Hawaiian Stream Food Web

  • Ecosystem services are the benefits that nature provides through natural processes. For example, plants provide clean air, natural fire helps…
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    Ecosystem Services – Vol. 12 No. 1

  • After reading the Caves and Karst Edition of Natural Inquirer, test your knowledge with an eyeChallenge. Examine each image taken…
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    eyeChallenge – Caves and Karst

  • After reading the Freshwater edition of Natural Inquirer, test your knowledge of the issue with this eyeChallenge. Explain what each…
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    eyeChallenge – Freshwater