An ice age also means more arable land, and eventually megafauna. Downside: Everyone has to move into former ocean plains Upside: You will be able to walk to c

An ice age also means more arable land, and eventually megafauna. Downside: Everyone has to move into former ocean plains Upside: You will be able to walk to circumnavigate most of the planet Earth at glacical maximum https://www.cbc.ca/greathumanodyssey/content/assets/images/minidocs/20k-1-image-3-original.jpg https://www.cbc.ca/greathumanodyssey/content/assets/images/m...