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Long-term Contraception More Effective Than Pills
yahoo.com 15 hours, 44 minutes ago(Reuters) - A large real-life test of birth control methods found more U.S. women got pregnant while using short-acting methods such as pills, patches and vaginal rings -- and the failure rate was highest when they were used by women under 21. In ...
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Samsung Pushes Graphene One Step Closer To Silicon Supremacy
engadget.com 6 days, 6 hours agoGraphene has long-held notions of grandeur over its current silicon overlord, but a few practical issues have always kept its takeover bid grounded. Samsung, however, thinks it's cracked at least one of those -- graphene's inability to switch off current. Previous attempts to use graphene as a transistor have involved converting it to a semi-conductor , but this also reduces its electron mobility, negating much of the benefit. Samsung's Advanced Institute of Technology has created a graphene-silicon "Schott





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