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(PhysOrg.com) -- The problem exists on both a large and a small scale, and it even bothered the ancient Egyptians.

(PhysOrg.com) -- The problem exists on both a large and a small scale, and it even bothered the ancient Egyptians. However, although physicists have long had a good understanding of friction in things like stone blocks being pulled by workers into the shape of a pyramid, they have only now been able to explain friction in microscopic dimensions in any degree of detail.

A plug-and-play system for cities that want the benefits of real-time data crunching, without the big bills required to become a true city of the future.

If you work with or are expanding to foreign markets, it's important for your employees to have access to language education. We've found five engagingand freethat can start your company down the path to fluency. Yes, there's an app for that.