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Science

Israeli Scientists Freeze Water By Warming It 165

ccktech writes "As reported by NPR and Chemistry world, the journal Science has a paper by David Ehre, Etay Lavert, Meir Lahav, and Igor Lubomirsky [note: abstract online; payment required to read the full paper] of Israel's Weizmann Institute, who have figured out a way to freeze pure water by warming it up. The trick is that pure water has different freezing points depending on the electrical charge of the surface it resides on. They found out that a negatively charged surface causes water to freeze at a lower temperature than a positively charged surface. By putting water on the pyroelectric material Lithium Tantalate, which has a negative charge when cooler but a positive change when warmer; water would remain a liquid down to -17 degrees C., and then freeze when the substrate and water were warmed up and the charge changed to positive, where water freezes at -7 degrees C."

iPhone Interest Still Going Strong 339

Even though the iPhone has already been released into the wild, the amount of excitement surrounding this device doesn't seem to be subsiding by any measurable degree. Many readers have submitted their favorite reactions to the shiny new gizmo including a BusinessWeek report that suggests the iPhone only costs around $220 to make, a user review from MacScoop, one user's top 10 interface mistakes, a roundup of early security concerns, and details on the hardware behind the phone. Read on for more details.

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