5- Authorea is natively built on Git. Our Git back-end has two major advantages: 1) All changes made to Authorea documents are tracked by Git i.e. one of the most robust version control systems. No more longer will you  need to tracking track  changes in Word. Version history of any document isnicely  integrated within the document itself. 2) Since every document in Authorea is a Git repository, you can include more than just text and images: data, code, videos, data visualizations, notebooks, workflows. Authorea is a data-driven media-rich platform.