Simplify the following text for a Grade 10 native English-speaking person.
Original: Obdurodon differed from modern Platypuses in that it had molar teeth ( in the modern platypus , individuals lose their teeth upon reaching adulthood ) .
Simplified: Obdurodon differed from modern Platypuses in that it still had teeth ( except for juveniles , the modern platypus does not have teeth ) .