In an age of ultra-niche interests, here’s an idea: instead of having many content creators write for a single website, why not have many content creators create material for as many different websites as they care to birth, all of which can then be funneled back into the master site.
It would be like the blog network model only *even more niche*
Science Website -> Neurotastic.com, PhysicsLocus.com, SolarObservatory.com, etc.
It would require that journalists become coders or else become familiar with a system created for them by coders that would allow them to rapidly deploy whole sites (e.g. WordPress + a templating system or a white-label version of SquareSpace). Throw a few designers and a photo editor or three into the mix, add video and podcasts, and voila — instant media empire.