1.) It's easier to contain or add energy that remove it from a system 2.) The ice ages occured more gradually so didn't disrupt food systems as much 3.) Ice a

1.) It's easier to contain or add energy that remove it from a system 2.) The ice ages occured more gradually so didn't disrupt food systems as much 3.) Ice age wood is great for instrument making so we got sweet string instruments out of it 4.) Most hominems died in the last ice age. It's speculated that all non homosapien species were wiped out during or due to the ice age.