Abraham Lincoln came into office a bit prior to the civil war and remained in office until past the end of it until he was assassinated.
The atoms changed the ideas of the universe because that means everything is made by little tiny atoms
Pyramids were built with a variation of stone materials; low grade limestone was used at the core; fine white limestone was used for the outer casting or to cover interior walls; pink granite was used also on inner walls; basalt or alabaster was used for floors; and mud bricks were used to build the walls in the temples.