A tiny cell that broke a big rule of biology

Fantastic - the nitroplast joining a pretty exclusive club there.

Bigelowii itself seems very interesting, even without this nitrogen fixing organelle, having two completely different phases to it's life - one in a weird dodecahedral calcareous shell and one without as a mobile flagellate. Apparently it can exist and reproduce in either form, and occasionally switch forms. It took scientists a long while to realize the two forms are actually the same species.

Kudos to the scientists everywhere that continue to explore the mysteries of nature

This is a nicely written article, which feels like a rarity lately.

The plastid wiki might be germane.

https://en.wikipedia.org/wiki/Plastid

Edit: "It was a type of algae called Braarudosphaera bigelowii. Hagino fondly just calls it Bigelowii."

Is this pronounced bigggie-lowie?

CO2, you say? Human activity produces tens of percent of the bioavailable nitrogen.

Since computational biology is all about simulation, do the chloroplast, the mitochondria, and now the nitro-last, have definitions that could be actively simulated ?

A 20 year search leads to the discovery of the nitroplast, a nitrogen-fixing organelle hiding inside algae.