Maths & measurement
Babylonian mathematicians devised a counting system based on the number:
How many years are encompassed by the ancient Metonic cycle (a near-exact common multiple of the solar year and the lunar month, named after Meton of Athens)?
Italian merchant Leonardo of Pisa is famous for introducing what to Europe?
A scientific explanation based on the fewest possible causes – named after William of Ockham – is known as:
The supercomputer that defeated chess grandmaster Garry Kasparov was called: