In 1886, fossil hunters dug out
another skeleton in Colorado.
This one was almost whole. The
skull, plates, and tail were all in
place. Its back plates stood up!
Scientists now knew better what
Stegosaurus looked like. It had
a tiny head. Its brain was about
the size of a plum!
Stegosaurus had two rows of back plates.
L O A D I N G L O A D I N G L O A D I N G
. . .
. . .
. . .
I
L O A D I N G L O A D I N G
. . .
. .
. .
M.P. Felch discovers the
first Stegosaurus fossils in
Colorado.
1876
The Stegosaurus dies out.
140 MILLION
YEARS AGO
O.C. Marsh names the
Stegosaurus.
1877
Stegosaurus fossils prove it
was a dinosaur.
1879
New fossils show plates stand
up on Stegosaurus’s back.
1886
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