The problem: Answer a question about this article:
General Electric heavily contaminated the Hudson River with polychlorinated biphenyls (PCBs) between 1947-77. This pollution caused a range of harmful effects to wildlife and people who eat fish from the river or drink the water. In response to this contamination, activists protested in various ways. Musician Pete Seeger founded the Hudson River Sloop Clearwater and the Clearwater Festival to draw attention to the problem. The activism led to the site being designated by the EPA as one of the superfund sites requiring extensive cleanup. Other sources of pollution, including mercury contamination and sewage dumping, have also contributed to problems in the Hudson River watershed.
What other types of pollution have contaminated the Hudson River watershed?
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The answer: mercury contamination and sewage dumping

The problem: Answer a question about this article:
Darwin went to Edinburgh University in 1825 to study medicine. In his second year he neglected his medical studies for natural history and spent four months assisting Robert Grant's research into marine invertebrates. Grant revealed his enthusiasm for the transmutation of species, but Darwin rejected it. Starting in 1827, at Cambridge University, Darwin learnt science as natural theology from botanist John Stevens Henslow, and read Paley, John Herschel and Alexander von Humboldt. Filled with zeal for science, he studied catastrophist geology with Adam Sedgwick.
Who did Darwin assist in researching marine invertebrates?
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The answer: Robert Grant

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ReplayGain is a standard for measuring and storing the loudness of an MP3 file (audio normalization) in its metadata tag, enabling a ReplayGain-compliant player to automatically adjust the overall playback volume for each file. MP3Gain may be used to reversibly modify files based on ReplayGain measurements so that adjusted playback can be achieved on players without ReplayGain capability.
What is measuring and storing loudness of an MP3 file also known as?
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The answer: audio normalization

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On January 10, 2007, the National Archives and Fold3.com (formerly Footnote) launched a pilot project to digitize historic documents from the National Archives holdings. Allen Weinstein explained that this partnership would "allow much greater access to approximately 4.5 million pages of important documents that are currently available only in their original format or on microfilm" and "would also enhance NARA's efforts to preserve its original records."
In January of 2007, what internet company did the National Archives partner with?
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The answer:
Fold3.com