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Pat Megonigal on research expedition
Sunrise at the Global Change Research Wetland
Chunwu Zhu at the Smithsonian’s Global Change Research Wetland
Australian Rainforest
Poecilocharax callipterus
Cattle ranch near Apuí, Amazonas State, Brazil
Research team collects fish specimen
Research team collects fish
Poecilocharax rhizophilus
River microhabitat of Poecilocharax callipterus
Microhabitat of Poecilocharax rhizophilus fish
First image of the black hole at the center of the Milky Way
Making of the image of the black hole at the center of the Milky Way
West Berkeley Shell Mound in California exposed during excavation
Eroding Late Holocene Native American oyster midden at low tide in Fishing Bay, Maryland
Accumulation of oyster, other shellfish, animal bone and artifacts
Crystal River site in Florida with shell mounds
Close-up a shell midden or deposit of oysters on the Damariscotta River in Maine
Shell deposits at Tseshaht First Nation village in the Pacific Northwest
Crystal River site in Florida with shell mound
Shell midden or deposit of oysters on the Damariscotta River in Maine
3¢ Centennial of Baseball Issue pane of fifty autographed by Postmaster General James A. Farley, 1939
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