The Earth is both an extraordinary and a scary place. From natural wonders, to natural disasters, some things we have figured out, and others remain a mystery. The study of what makes our beautiful planet tick is known as Geography, and focuses on understanding the physical aspects of our planet. This includes everything from the core to the crust and on to the atmosphere, such as mountains, rivers, volcanoes, earthquakes, and us humans. With Alison's free online Geography courses, you too can gain a strong understanding of the planet we call home.