Simplify the following text for a Grade 9 native English-speaking person.
Original: The cervical vertebrae were less elongated and more heavily constructed than those of Diplodocus and the bones of the leg were much stockier ( despite being longer ) , implying a more robust animal .
Simplified: The cervical vertebrae were less elongated and more solid than those of Diplodocus . The bones of the leg were much stockier ( despite being longer ) , implying a more robust animal .