Across
- 3. Dinosauria's posterboy
- 4. Second smallest unit of geologic time
- 8. Long-legged sea-dweller that's been crawling since the Cambrian
- 12. Four-legged ambler
- 15. Largest ever land animal
- 17. Time period of an arachnophobe's nightmares
- 20. Worst of the worst extinction events
- 22. Orange stone that may contain a mosquito
- 25. Modern dinosaur with a mesozoic fashion sense
- 27. Dinosaur (in)famously ill-depicted in Jurassic Park
- 29. Supercontinent of the Triassic period
- 30. Snack for a Triceratops, maybe
Down
- 1. Home for a baby dinosaur
- 2. Non-dinosaur named after a wind god
- 5. Aerial cousin of dinosaurs
- 6. Killing ____: sickle-shaped weapon of choice for a raptor
- 7. Commonly fossilized invertebrate with a spiral shell
- 9. Unfortunately extinct dinosaur with a particularly rotund frame
- 10. Early flowers
- 11. Scuttling arthropod with a 270 million year lease on life
- 13. Dinosaur with an in-built trombone
- 14. Largest living dinosaur
- 16. Flat-leaved tree genus alive since the Jurassic
- 18. Period in which Stegosaurus lived
- 19. Very, very old group of squishy sea-dwellers
- 21. Sharp-thumbed dinosaur with a lizard namesake
- 23. "Good mother lizard"
- 24. Shape of Spinosaurus' tail
- 26. ___ pit: graveyard for a great many mammals
- 28. Fuzzy feature of many a theropod