In contrast, on Daisyworld competition between the daisies ( based on temperature-effects on growth rates ) leads to a shifting balance of daisy populations that tends to favour a planetary temperature close to the optimum for daisy growth.
12.
This perturbation of Daisyworld's receipt of solar radiation caused the balance of daisies to gradually shift from black to white but the planetary temperature was always regulated back to this optimum ( except at the extreme ends of solar evolution ).
13.
Plate tectonics, the authors say, promotes biodiversity by producing mountain chains and other kinds of environmental complexity, lessens the odds of extinctions, helps keep planetary temperatures even through the recycling of carbon and makes dry land on which advanced civilizations can flourish.
14.
To be in the star's habitable zone, any suspected planet around Alpha Centauri A would have to be placed about 1.25 AU away about halfway between the distances of Earth's orbit and Mars's orbit in the Solar System so as to have similar planetary temperatures and conditions for liquid water to exist.
