Hi there, pick a niche if you need to but be accurate and detailed. At the end of your science hubs, link back or add links to notable scientific journals, or peer journals and notable sources. Add the source of your data in your posts and go further than news papers. To get stories try visiting nytimes.com or other reputable news stories and under Health look at what are the most pressing issues and write about them. Instead of copying or paraphrasing, you should do your research on that topic the newspaper article focuses on and make sure it is accurate. Please consider that when writing a scientific hub, unlike other types of hubs, readers tend to follow the advices most aptly, providing wrong information can do more harm than any good.