  Visual stories are an effective and powerful tool to convey specific
information to a diverse public. Scrollytelling is a recent visual storytelling
technique extensively used on the web, where content appears or changes as
users scroll up or down a page. By employing the familiar gesture of scrolling
as its primary interaction mechanism, it provides users with a sense of
control, exploration and discoverability while still offering a simple and
intuitive interface. In this paper, we present a novel approach for authoring,
editing, and presenting data-driven scientific narratives using scrollytelling.
Our method flexibly integrates common sources such as images, text, and video,
but also supports more specialized visualization techniques such as interactive
maps as well as scalar field and mesh data visualizations. We show that
scrolling navigation can be used to traverse dynamic narratives and demonstrate
how it can be combined with interactive parameter exploration. The resulting
system consists of an extensible web-based authoring tool capable of exporting
stand-alone stories that can be hosted on any web server. We demonstrate the
power and utility of our approach with case studies from several of diverse
scientific fields and with a user study including 12 participants of diverse
professional backgrounds. Furthermore, an expert in creating interactive
articles assessed the usefulness of our approach and the quality of the created
stories.
