Tyrannosaurus rex

[Spalea]

@"Bitishannah" 

About #248: " T rex is known as one of the brainiest dinos isn't it? And reptiles do exhibit parental care right? I think absence of neocortex is not a sign of low intelligence!. "


A 300-400 gramme brain for a 9 tons body isn't that much (an extant 5 tons elephant is a 5 kilos-brained animal). The narrator readily compares the t-rex to an extant croc which hasn't a developed parental behavior, that's the least one can say. The mother croc moves the babies into the water just after the hatching and what else ? It's all !  Perhaps the mother t-rex could stay near the nest in order to protect it and when the cubs were born they can watch their mother and learn/retain a little about it. Mimetic behavior, taking into accountthe fact they were very weak and small compared to the adults and reacting accordingly, yes, but I think it's all...

The raptors (velociraptors, troodons, deynonychus, and so on...) with a less weighted brain (perhaps 200-250 grams) for a much lighter body weight (80, 100, 200 kilos) should have been much more performing and could be able to adopt an efficient dynamic group. Reply