#2990: Late Cenozoic
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Transcript
[Three aliens sit in a classroom. Each of the aliens has an oval-ish body ending in multiple tentacles, striped eye stalks ending in eyes with an iris and pupil, and a small mouth represented by a few vertical, close-together lines. One alien sits on a desk-like platform in front of a board covered with minute text and drawings of a T-Rex and a (presumably) Triceratops skeleton. Two aliens sit on platforms equally high as the desk-like one, but with a single narrow stool-like leg, watching the teacher alien. The teacher alien on the left points at the board with one tentacle.]
Left alien: Species such as triceratops and tyrannosaurus became more rare after the Cretaceous, but they survived to flourish in the late Cenozoic, 66 million years later.
Left alien: Many complete skeletons have been discovered from this era.
[Caption below the panel:]
It's going to be really funny when our museums get buried in sediment.
(Sourced from explainxkcd.com)
Title text:Our nucleic acid recovery techinques found a great deal of homo sapiens DNA incorporated into the fossils, particularly the ones containing high levels of resin, leading to the theory that these dinosaurs preyed on the once-dominant primates.