What was the breakthrough to understanding how the Marianas Trench formed (hint: the Cold War)?

what precedent do you see the ordinance of 1787 setting for the 1st amendment of the us constitution : )

this person under me, copied me. owo

i'm asking the same thing i asked this other cat all of

the northwest ordinance of 1787 guaranteed basic rights for settlers and banned slavery there.

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers