Ask HN: Which sites would you include in a science news aggregator

Im building a science news aggregator, i get science news from all over the place but i feel like i miss some of the best news because i don't know where to look. I get a lot of it from HN, but i miss some because it gets drowned out by other stuff. I'm building something (for myself and anyone interested) that just gets all the latest news from all the important sites and shows it. I just don't know what or where all the "important" sites are. If you have any good sources please let me know.