Scientists make discoveries that change the world, but even they can't explain some mysteries. Roughly 4% of the world's population hears "The Hum," which is a geography-free sound. The next mysterious thing is a cone-shaped monument found in the Sea of Galilee in Israel. This monument was discovered accidentally by sonar scanning in 2003. Gobeklitepe, Turkey has massive carved stones which are 6,000 years older than Stonehenge.

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