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Baghdad battery
Ancient Achievements Still Unexplained By Modern Science
Elon Musk might be at work perfecting the electronic battery today, but as early as 250 B.C., clay batteries were used in an ancient town near Baghdad that could produce at least two volts of electricity. What could they possibly have been powering back then? Nobody knows.

So even though the iPhone 6 and the Playstation 4 may seem impressive, it's crazy to think that we still can't figure out how some inventions and building techniques of ancient times were even conceived. Maybe we aren't as technologically advanced as we think. Maybe if we dig deep enough, we will find ancient iPhones and Playstations far superior to our own.