Ill give you brailyest if you answer this. can a snake blink.

A snake cannot blink, and they have to sleep with there eyes open because they have no eyelids. Instead of eyelids, they have a clear membrane that covers their eyes. 

Snakes are therefore unable to close their eyes,they can't blink and they must sleep with their eyes open. The snake you observed at the Melbourne Museum may therefore have been asleep. A snake's eye scales are part of its skin. This means that when a snake sheds its skin, it must also shed its eye scales.
have a great day!!!^_^

It should be cryosphere and hydrosphere