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Pregnant women could be unwittingly exposing their unborn children to harmful amounts of the hormone oestrogen. Researchers have demonstrated that tiny quantities of this hormone, found in birth-control pills and some plastics, can cause serious deformities in male mouse fetuses.
"The most effective actions that we could take now are strong efforts to improve energy efficiency, employ renewable energies, and reduce air pollutants, especially fugitive methane, other ozone precursors, and black carbon (soot)," Hansen remarks. "[In] the long-run we will need either carbon-free power sources or we will need to capture and sequester CO2.�
From sleep hogs to early birds, people have a wide range of shut-eye needs. Now researchers report in the journal Nature that they have identified a single gene in fruit flies that determines how much rest the creatures require. Because humans carry a similar gene, the findings may shed light on the mechanisms and functions of sleep...