Not exact matches
It includes everything from huge boulders to particles only a few nanometers in diameter, but most of it is a puree
created by
uncountable high - speed micrometeorites that have been crashing into the moon unimpeded by atmosphere for more than 3billion years.
I have not made up my mind yet: We know so little about a climate that over a billion years has at times been hot enough to boil water or
create and destroy life in
uncountable cycles, that has sent glaciers down to cover temperate lands and then has melted the glaciers so that life could return.