All images are copyrighted by their respective institutions.
The copyright law of the United States (Title 17, United States Code)
governs the making of reproductions of copyrighted material, including
but not limited to downloading, printing, and performance (i.e., display)
Any individual who uses copies of text and/or images for purposes in
excess of “fair use” as defined by the copyright law may be
liable for copyright infringement.
Any use of text and/or images which is not defined as educational or
fair use requires written permission from the principal investigators.
Content of this web site may not be used for
The authors welcome classroom use of its web site text and images. Students
and teachers may download text and/or images without restriction for
use in a classroom setting. To request non-classroom use of text or
images from the web site, contact Principal Investigator Julia King.
Links to other web sites are occasionally provided as a convenience
for our users and their inclusion does not imply the authors’ endorsement
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read all terms, conditions, and privacy statements of each web site