The conversation between human and AI assistant.
[|Human|] Give me a bulleted list of the distinctive physical characteristics of Beavers described in this passage.
[|AI|] - Large skulls
-Four chisel shaped incisors covered in thick orange or reddish-brown enamel
- One premolar and three molars on all four sides of the jaw
- Nostril valves that close underwater
- Membranes that can cover the eyes underwater
[|Human|] 
Give me a bulleted list of the distinctive physical characteristics of Beavers described in this passage.