the.com/stegosaurus

a bus-sized armored tank with the brain of a walnut and zero apologies

means A large, plant-eating dinosaur of the Jurassic period, recognizable by the double row of upright bony plates along its back and the spikes at the end of its tail.

from Coined by the American paleontologist Othniel Charles Marsh in the late 19th century, from Greek 'stegos' (roof or covering) plus 'sauros' (lizard) — literally 'roof lizard.' Marsh thought those famous back plates lay flat like overlapping shingles, armoring the beast like a tiled roof; we now believe they stood upright, but the rooftop name stuck. 'Sauros' is the same lizard that scuttles through dinosaur, tyrannosaurus, and a whole zoo of other -saurs.

tiny brain
Walnut-sized brain ran a body weighing five tons
tail weapon
Spiked tail called a thagomizer, named after a cartoon
missed humans
Lived 80 million years before T. rex existed
plate mystery
Back plates likely controlled temperature, not defense
slow mover
Top speed roughly that of a brisk human walk
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