From Metadata to Open Data to Open Science The plethora of new services and capabilities of what is currently called Web 2.0 or 3.0 is having a big influence on science. In all disciplines, methods of doing research and creating and sharing knowledge are becoming more and more “digital” and they have recently been grouped under the terms Science 2.0 or Open Science. Open Science is a means and not an end in itself and it is much more than just open access to publications. It includes and requires full and federated access to datasets, data collections, algorithms, configurations, tools and applications, codes, workflows, scripts, libraries, services, system software, infrastructure, compilers, hardware, etc. Open Science is considered a key enabler of full reproducibility and re-usability of scientific results, which in turn are the base of an Open Innovation Economy and of a Knowledge Society. Transparency, openness, and reproducibility are recognized as vital features of science and pillars of the Scientific Method and it is strongly believed that an Open Science attitude should be “taught” to researchers since the very early stages of their careers. This keynote speech presents the issue of the so-called "reproducibility crisis" and outlines the components of a federated Open Science Platform able to tackle and cure it. Authorship of scientific results is also discussed.