The Snowball earth

So today's lesson was about the ancient climates. One of the additional reading mentioned was this: snowball earth After reading this - I was intrigued the research is quite recent (1998) - and Namibia (which is adjacent to my home country, South Africa) played a crucial role in this. I searched the timeline of the earth on Google and found this: The history of the Earth So the 600 Million years ago there was an Ice Age - actually lined up pretty well with the Biological evolutionary Data. It is truly fascinating. I've created a board to illustrate how this happened. I'm still uncertain about the "chemical weathering" part. My snowball earth