Shares in Bruker BioSciences and Stratagene both declined more than 5 percent for the tracking period ended Tuesday, leading the way among the 10 companies in the BCW Index whose shares declined during the period. Stratagene's shares dropped 7.22 percent, far exceeding the 5.59-percent gain registered the week before, while shares in Bruker dropped 5.32 percent, giving back part of its 9.89-percent gain last week.

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Researchers find that historical factors influence which genes are the most highly studied, the Atlantic reports.

The US National Science Foundation's new sexual harassment policy is to go into effect next month, according to Nature News.

Researchers report using genotyping to tie together illegal ivory shipments and trace them back to a handful of cartels, the New York Times reports.

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