David Moscatoさんのイラストまとめ

Day 19. The Cretaceous-Paleogene (K-Pg) Extinction – the end of the “Age of Reptiles”
#30DayEarthHistory

#Parasaurolophus' iconic crest was great for display, but also an extension of its nasal passages - thought to be a resonating chamber for making lovely dino-songs!

As a "duck-bill", it also had HUNDREDS of teeth, and was among history's most sophisticated chewers!
#DinoCup

Day 3. It's Aliiive! Earth's Earliest Organisms.
#30DayEarthHistory

George Washington also liked fossils: he had a Mastodon tooth from Kentucky! (Pic is a different tooth) #USofScience https://t.co/wwKZ7MJgLN