Or "Why dolphins are awesome".

First, i need to define what a "vortex ring" is. Take an imaginary axis where fluid or gases are rotating around that axis, essentially forming a spinning tube. Now take that tube and bend it so that it makes a donut. That's a vortex ring. And dolphins can just make them to play with.

Cause they're more awesome than you.

In 1867, Lord Kelvin suggested you could tie these rings into knots. It's taken until now for physicists to figure out how to make this happen in a lab. They needed 3D printer technology to be invented first, i guess, so that they could make this looped "airplane wing".

And here's a video from different angles so you can really see the knots.

Not being all that knowledgeable about particle physics or magnetic fields, i'm not sure what the results of this will be, but i think it's pretty nifty that you can create a knot in a fluid.