Middle Cretaceous

Middle Cretaceous is the twelfth era in this game. there are 8 organisms in this era. The requirement for unlocking this era is researching Saurischia.

Trivia

 * This era spans from 120 to 90 million years ago. The entire Cretaceous spans from 146 to 66 million years ago.
 * The second and last flying creature(Pteranodon) appear in this era.