Special | 28m 48s
The Earth is our home, but it is made up of many complex systems all working in balance to keep the planet and us alive. Find out more about our fascinating world on this month’s Science Trek. Host Joan Cartan-Hansen and her guest scientists, Virginia Gillerman and Jeffrey Johnson will answer students’ questions about the Earth.
Aired: 04/14/14Video has closed captioning.
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Major Funding Provided by the Laura Moore Cunningham Foundation