National Medal Winner - Ruth Patrick
National Millennium Time Capsule
National Medal Winner

PHOTO: Vial of diatoms Patrick, Ruth, National Medal of Science, 1996
Vial of diatoms (unicellular plants that indicate water conditions)
"I have used the composition of diatom communities, which are unicellular plants with siliceous walls, to determine past and present water conditions, and from this information to predict trends, particularly as regards pollution, which may take place in these bodies of water. Diatoms are of great use, not only in determining past conditions but also present conditions and predict future trends. I felt that they were important organisms to pass onto the future."

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