From the Fireflies, the Chirping of the Crickets and the firing of Neurons in our brains fall into Synchronicity. Although the effect was noticed by Huygens, only two and a half centuries later in 1967, a US theoretical biologist Art Winfree first proposed the mathematical modelling. His method was quite complicated, but in 1974, a Japanese Physicist Yoshiki Kuramoto (82 years old now) simplified the maths using coupled oscillators.