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A picture is worth a thousand words. Take a look at some images capturing science activities at the USGS Wetland and Aquatic Research Center. 

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historical image showing the first Administration Building of the United States Department of Agriculture
First Administration Building of the United States Department of Agriculture
First Administration Building of the United States Department of Agriculture
First Administration Building of the United States Department of Agriculture

The first Administration Building of the United States Department of Agriculture (USDA) stood on the Mall side of the present Administration Building and was in use until the early 1900s

Image: Zebra Mussel
Zebra Mussel
Zebra Mussel
Zebra Mussel

Zebra Mussel (Dreissena polymorpha) vs Quagga Mussel (Dreissena rostriformis bugensis). The only two dreissenid mussels known to have been introduced into the US. Both the quagga mussel and zebra mussel are prolific breeders possibly contributing to their spread and abundance. The introduction of both dreissenid species into the

Zebra Mussel (Dreissena polymorpha) vs Quagga Mussel (Dreissena rostriformis bugensis). The only two dreissenid mussels known to have been introduced into the US. Both the quagga mussel and zebra mussel are prolific breeders possibly contributing to their spread and abundance. The introduction of both dreissenid species into the

Image:  Zebra Mussel
Zebra Mussel
Zebra Mussel
Zebra Mussel

Zebra mussels are small, averaging about an inch long. Two inches is approximately the maximum size.  

Zebra mussels are small, averaging about an inch long. Two inches is approximately the maximum size.  

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