Erik Kiviat stands in purple loosestrife as he checks insect types at Annandale-on-Hudson, N.Y. Kiviat argues that the plant is not always the bane it's cracked up to be.
(Photo by Jim McKnight / AP)
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Dressed in colorful costumes, some revelers pose in front of the Cologne Cathedral to celebrate the start of this year's street carnival season in Friedrichshafen, Germany.
(Photo by Roberto Pfeil / AP)
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7-year-old Maria looks at a 30-times magnified head of a mock-up grasshopper in the exhibition rooms of Dresden's town castle, eastern Germany.
(Photo by Matthias Rietschel / AP)
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