I need help with this history portfolio the4 screenshots are what im working on

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

consider an orange peel: if you want to try and lay it flat, you have to stretch it, we know exactly how things are being stretched or squashed at any given point. we have many different map projections because each has different patterns of some projections can even preserve certain features of the earth without