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Louis
T. rex
tyrannosaur rex

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The questions about Louis's baby T. rex run even deeper than its appearance. With such limited fossils, some scientists have actually questioned whether the bones might belong to a different species of dinosaur entirely, something like a T. rex, but much smaller.
You're presenting of a mounted skeleton of this baby T. rex, and this is the first baby T. rex that's been found and has been put on display. How can you be sure that it is indeed a T. rex and it's a baby, because bones change as juveniles turn into adults.
You can read the characteristics of the bone tissue. And that can tell you if the animal is a full-grown individual or if it's a baby or a very young individual. So we know that perhaps in the future discoveries may prove that there was another species of tyrannosaur that essentially lived together with T. rex, and then maybe this is a baby of that particular species. But at the moment, with the information that we have, it seems that the most reasonable hypothesis is to say that this one represents a baby of a tyrannosaur rex.

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