Gravitation between two objects increases when the distance between them decreases.
When the mass of an object increases, its gravitational pull also increases.
The answer is - adiabatic lapse rate.
Adiabatic lapse rate refers to the rate at which the air expansion cools. For the dry air it has the value of 9.8 degrees per kilometer. When the air that is saturated starts rising and cools, the process of condensation of water vapor begins, releasing latent heat in the process.
They do not have lungs.
They can lay up to 250 eggs a day (one at a time YIKES!)
They are poisonous (to vertebrates)