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Learn about planets outside our solar system through Exoplanets and Alien Solar Systems by Tahir Yaqoob, Ph.D., a book in our online store book collection.
This otter is floating on its back.
Click on image for full size
Windows Original, adapted from Corel Photography

Otters

Have you ever seen an otter? They look like big rodents swimming in the water! Otters are very good swimmers, so they spend most their lives in the water.

Otters eat fish, crabs, clams, sea urchins and mussels. When they get tired, they like to swim on their backs.

There aren't many animals that eat otters. But, oil spills can kill many otters.

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Traveling Nitrogen is a fun group game appropriate for the classroom. Players follow nitrogen atoms through living and nonliving parts of the nitrogen cycle. For grades 5-9.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF