What large lake system is located on the boarder of the u. s.a and canada?

the gay one

explanation:

i'd say from a moral standpoint, the brains are both of equal value.

explanation:

the entire comment thread.

explanation:

since the crust is readily accessible, scientists have been able to perform hands-on experiments to determine its composition; studies on the more distant mantle and core have limited opportunities samples. so scientists also rely on analyses of seismic waves and gravity and as well as magnetic studies.