Why bat does not get any
crushes as if fly at dark?

When bats are paying attention to their sonar signals, they can navigate without crashing into things. They can identify and capture food while it is moving. The echolocation system is designed to locate very small insects. ... Unlike nocturnal bats, they have well-developed eyes and poorly developed echolocation.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d