Tully monster
A long snout at the front and eyes on stalks to either side.
Preparing the Tully monster exhibit.

A long snout at the front and eyes on stalks to either side.

Preparing the Tully monster exhibit.
Explore together
Explore together
The Tully monster’s eyes stuck out to the sides, like the ends of a little bar. Can you find the long snout stretching out in front of them?
Fossils of Tully monster date to the Carboniferous and have been found in Illinois, USA.
Leon Made This compiled these research notes from public museum resources and scientific papers while preserving uncertainty in the reconstruction. Last reviewed 2026-10-22.
The code is licensed under AGPL-3.0. Original science writing and project artwork use CC BY-NC-SA 4.0 for non-commercial sharing. The brand policy prevents impersonation, and third-party assets keep their original licences.
Official source
Prehistoric Animal Museum is made and maintained by Leon Made This. Use these addresses to verify the official project and its creator.
More information is available below.
Leon Made This
I’m Leon, a developer and a dad. When my daughter was three, dinosaur chases on television frightened her, so I made a 3D prehistoric animal museum where she could look quietly and listen only when she wanted to.
The museum is free, with no sign-up, adverts or visitor tracking. Finding one interesting detail at a time is plenty.
Official source
Prehistoric Animal Museum is made and maintained by Leon Made This. Use these addresses to verify the official project and its creator.