From the internal combustion engine to the artificial heart, the legacy of Al-Jazari, the 12th century Muslim inventor, is everywhere around us. It's no exaggeration to say he laid the technological foundation for modern life as we know it. From cranks to pumps, from water clocks to mechanized robots, Al-Jazira wasn't just years ahead of his time, he was centuries ahead. In this thorough ANCIENT DISCOVERIES examination of Al-Jazari's influence, modern reproductions of his greatest breakthroughs bring his genius to life. See his famous elephant-themed, fully-operational water clock and other stunning technological achievements.

• Sean Barrett