Rabbit Holes: Mammals
Spines
Our World pg. 168-187
Anthology pg. 170, 172, 174, 182, 186, 
Whales ​pg. 36-41
pg. 52-55

Books

• After the Dinosaurs: Mammoths and Fossil Mammals by Charlotte Lewis Brown 
• Prehistoric Mammals by Kathleen Weidner Zoehfeld
• Mammal Takeover! (Earth Before Us #3) by Abby Howard (graphic novel)

PBS Eons Playlist Cenozoic Era