I found something very interesting the other night while surfing the web... I came across a site called The Lifeboat Foundation. Their name actually suits their purpose. They claim that they are nonprofit, nongovernmental organization dedicated to encourage scientific advancements in technology which will provide aid towards the survival of humanity. The Lifeboat Foundation is aiming to launch self-contained space arks by 2020 as an 'insurance policy' against Grey Goo and weapons deadly to the human race. Don't take my word for it, check out the links if this topic interests you.