Simplify the following text for a Grade 9 native English-speaking person.
Original: In the 4th century BC Pyrrho of Elis ( c360 â `` 275 BC ) , who traveled and studied as far as India , adopted practical skepticism .
Simplified: One of its first proponents was Pyrrho of Elis ( c. 360-275 B.C. ) , who traveled and studied as far as India and propounded the adoption of `` practical '' skepticism .