Under what circumstances will the front of a glacier advance, retreat, or remain stationary?

What are two australian geographical features that hindered early exploration? western plateau gulf of carpentaria great barrier reef great dividing range

How have ethnic groups shaped the population in central america and the caribbean? how has migration shaped the population in central america and the caribbean? how has small land areas shaped population in central america and the caribbean? how has a rapid population growth shaped the population in central america and the caribbean?

How are the arctic and antarctic circles alike?