Dinosaurs: Rulers of the Earth
Like Duolingo, but for Dinosaurs: Rulers of the Earth. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
Free during early access · No credit card · iPhone & Android

Key ideas in Dinosaurs: Rulers of the Earth
- Dinosaur legs were positioned directly underneath the body
- Dinosaur hip joints supported an upright vertical posture
- Dinosaur legs were positioned beneath the body
- Lizard and crocodile limbs project out to the sides
- Dinosaur hip structure and posture
- Dinosaurs are strictly land-dwelling animals
- Ornithischia refers to bird-hipped dinosaurs
- Unique hip structure and upright stance
- Flying and marine reptiles are different groups
- Saurischia refers to lizard-hipped dinosaurs
- Identifying animals excluded from dinosaur classification
- Difference in posture
- Two main branches of the dinosaur family tree
- Dinosaurs lived exclusively on land
- The primary physical feature that distinguishes dinosaurs from other reptiles
- Marine and aerial reptiles are excluded from the group
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Dinosaurs: Rulers of the Earth the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What kind of posture did the dinosaur's unique hip joint allow them to maintain?
Get it right to open this lesson and 53 more in the app.
Where Dinosaurs: Rulers of the Earth takes you
Travel back millions of years to meet the most incredible creatures to ever walk the planet. Learn how they lived, what they ate, and why they eventually disappeared.
- 1
Meet the Dinosaurs
- What Makes a Dinosaur?
- The World Before Dinosaurs
- Big, Small, and Everything In Between
- The Three Eras of Dinosaurs
- 2
How They Lived
- Meat Eaters and Plant Eaters
- Armor, Horns, and Spikes
- Family Life and Nesting
- How Dinosaurs Moved
- The Truth About Feathers
- Communication and Sound
- 3
Famous Giants
- T-Rex: The King of Lizards
- Long-Necked Giants
- The Three-Horned Triceratops
- 4
The End and Beyond
- The Great Extinction
- Finding Fossils Today
- Dinosaurs in Our Backyard: Birds
- Working as a Paleontologist
- Common Dinosaur Myths
4 sections · 18 units · 54 levels. Built to play, not to enroll.
You pick the voice
Dinosaurs: Rulers of the Earth is taught in the The Comedian style: learning with the laughs left in. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Dinosaurs: Rulers of the Earth today.
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