A genus of extinct animals known from fossilized hand-like footprints found in Triassic rocks, whose actual identity remains debated.
From Greek χείρ (cheír) 'hand' and θηρίον (thēríon) 'beast,' literally meaning 'hand-beast,' named for its distinctive hand-shaped fossil traces.
These mysterious Triassic fossils show hand-like prints, but scientists still debate what animal made them—it's a humbling reminder that even with physical evidence, ancient mysteries can baffle modern paleontologists.
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