The ChronoZoom project gives students a visual perspective on the history of the cosmos/earth/humanity, etc. If you click on the colored bars on the upper right of the page, starting with the Cosmos and then progressing to Earth/Life.. etc. The image will zoom in giving a neat perspective of the human timeline in the context of other timelines. Embedded within each section are videos, mini timelines, and teaching materials. Microsoft created this tool and is working in conjunction with others in order to fill it with valuable teaching information. I think it’s worth a look: http://www.chronozoomproject.org/#/t55

To read more about the development of Chronozoom: http://research.microsoft.com/en-us/projects/chronozoom/default.aspx