More than that, she calculated how high it will float, and how height will depend on temperature, before starting the experiment, and confirmed all her predictions.

Where did she do this? I haven't found anything in her twitter feed

Wow, that's hugely impressive! Where can I find more info about this? Is it all on twitter?

She has been alluding to old Soviet scientists having a theoretical foundation for the type of conductivity shown. She posted a link to this comment that explains some of the background: https://news.ycombinator.com/item?id=36996337

Check out her twitter for some real fun rants @iris_IGB

They use a magnet for movement. “When the magnet is placed parallel and flat to the bottom of the beaker, the sample stands at a 90deg angle to the field.”