Along period of worldwide colder temperatures resulting in great ice sheets is an

Why are constitutions, both federal and state, necessary for our government?

According to greenville why does great britain have a large debt and who should pay that debt? ?

"if i have seen farther than others," said newton, "it is because i have stood on the shoulders of giants." who were the giants to whom newton was referring? could this be said of any scientific accomplishment? explain.