Waters shares closed down nearly 13 percent for the trading week ended Tuesday after the company lowered its earnings projections for the third quarter, citing "slower than expected" sales growth. The company, which originally anticipated 8 percent year-over-year growth for the third quarter, said last Friday that it now expects only 3 percent year-over-year growth for the period (see story this issue). The company's shares fell 11.6 percent that day and never recovered.

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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.

In Nature this week: genomic ancestry analysis of Sardinians, current noncoding mutations in colorectal cancer, and more.