Passage: He published more than 500 articles and eight books. He is currently on the editorial board of more than 10 scientific journals, among them Chaos, Philosophical Transactions of the Royal Society A, PLOS One, European Journal of Physics, J. Nonlinear Science and Nonlinear Processes in Geophysics and of the Springer Series Complexity.

Question: How many editorial boards does he serve on?
more than 10