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Poverty and under-education dampen contraception use in Nepal but another factor may be more intractable: Deeply held cultural preferences for sons over daughters.

The cross-sectional study was based on data from the 2011 Nepal Demographic and Health Survey, which found that only one in five married adolescent and young women used modern contraception. Rates were lowest among women who resided in rural areas, lacked education or social status, were married as minors or had no sons.

Coffee may help lower your risk of having a stroke, especially if it is a regular part of your diet, according to research published in Stroke: Journal of the American Heart Association.

Green tea also, though it's unclear how green tea affects stroke risks. A compound group known as catechins may provide some protection. Catechins have an antioxidant anti-inflammatory effect, increasing plasma antioxidant capacity and anti-thrombogenic effects.  Some chemicals in coffee include chlorogenic acid, thus cutting stroke risks by lowering the chances of developing type 2 diabetes.

Terahertz (THz) radiation, in the electromagnetic spectrum between microwaves and infrared light, is rapidly finding important uses in medical diagnostics, security, and scientific research. 

But researchers are pursuing answers regarding potential human health risks. 

CITES today overruled objections from countries like Japan, China and India and listed five species of highly traded sharks under the CITES Appendices, along with both manta rays and one species of sawfish. 

Japan, India and Gambia challenged the Committee's desire to list the oceanic whitetip shark, while Grenada and China objected to listing three hammerhead species. 

Proponents of the various listing proposals include the USA, the EU, Australia, Brazil, Colombia, Comoros, Costa Rica, Croatia, Ecuador, Egypt, Honduras and Mexico. The shark and ray proposals received more than the two-thirds majority of votes necessary for adoption while the sawfish listing succeeded by consensus. 

Do people form into tribe-like communities on social network sites such as Twitter?

BANGKOK -- March 14, 2013 -- The following statement was issued today by WCS President and CEO Cristian Samper: