The first expansion for Catastrophic adds 40 new cards to the game around the theme of reproduction. This includes animal traits such as Viviparous and Oviparous, which allow your species to reproduce with live young and eggs, new plant traits for wind pollination and the use of scents and deceit to help your plants reproduce. The expansion introduces powerful new interaction cards, and new events that your species communities will have to handle, including oil spills and meteorites! —description from the publisher