Engineers Found Evidence of Hydraulics in an Ancient Pyramid, Solving a 4,500-Year-Old Mystery

Researchers found evidence that hydraulic systems might have been used to build Egypt's Step Pyramid of Djoser 4,500 years ...
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Prove you've got a top IQ by solving tricky cube-themed maths puzzle

Keeping your noggin busy is known to boost cognitive performance, sharpen memory, and aid focus and attention. Some even reckon that regular brain workouts can stave off the symptoms of dementia.