Because it's Friday: Magnets, how do they work?

Despite some skepticism (audio NSFW), we have a pretty good grasp on how magnets work, and some people have used that knowledge to do some pretty cool things with them. For example, a Norwegian startup is trying to launch a magnet-based game that allows you to create some spectacular chain reactions:

Meanwhile, some scientists demonstrate the power of the 4 Tesla magnet contained within a decommissioned MRI machine (via IFLscience):

 

Also check out what happened when they finally did decommission the MRI (and especially the FAQ in the comments, where I learned about the dangers of "air ice").

That's all for this week! See you back here on Monday, and have a great weekend.