11-15-2014, 08:51 AM
Ice ages are very realistic. We've had several and they have indeed shaped the world as we know it. For example, there was an ice-bridge between England and France for many years. This means we shared a lot of things that normally would not be possible. It's also why the UK is an island.
http://www.independent.co.uk/news/scienc...31107.html
http://www.independent.co.uk/news/scienc...31107.html