Historical clue formulations

• Dinosaur named for a lizard tooth — 2026-07-09
• Large, herbivorous dinosaur that could walk on two legs — 2021-01-19
• Bulky herbivorous dinosaur — 2020-06-16
• 30-foot-long dinosaur able to walk on either two legs or four — 2018-08-17
• One of the dinosaurs upon which Godzilla is based — 2017-08-11
• Dinosaur with large thumb spikes — 2009-05-23