FACT: 'Tyrannosaurus Rex' (T-Rex) is not the mature adult of its species. FACT: 'Nanotyrannus' is chick sized. FACT: In comparison...Female 'Nile' Crocodiles carry 25-80 eggs and as far as growing goes, Crocodiles never stop. Conclusion: We have possibly identified the T-Rex's mother... on the Oregon beach; and named her 'TIAMAT' mother of all dragons.