Buddhism

there's been speculation among Asian scholars (and possibly others), on whether -- either Heraclitus, or The Buddha on his pre-enlightenment peregrinations, were exposed to each other, or, each others' theories; since they were, more or less, contemporaries. But no one's come up with any data on a connection.

My own guess would be on: each arriving at the same point, independently. As you probably know, Buddhist teachings emphasize that truth is independent of its discoverers; & beings who have similar abilities can achieve similar results.

This is the basis for Theravada Buddhist doctrine regarding Pacceka (silent) Buddhas -- those who discover enlightenment by their own efforts, without the assistance of any external teaching; and could be found in different times & places; perhaps even here & now. According to the writings, the difference between these Silent Buddhas & the Teaching Buddhas -- is that Silent Buddhas lack the ability to explain the Way to others.

Cheers