This Genius Magnet Stops Dangerous Leaks in Seconds!

I found the above video on Reddit (warning: NSFW word in the subreddit title) but with non-English narration. 

I then found the embedded video in likely AI-generated English.

From there I found the Magnaseal website from Neothane which had the following two video embedded.

...and...

Sadly the Neothane website doesn't list any prices just a button to request a quote. 

Other sites selling the MagnaSeal, however, suggest that it's a rather pricey item, so I don't think I'll be picking one up to demonstrate in my classroom.

Many Moving Magnets Melting Metal

Ooh, alliteration! I do love some alliteration.

I also love seeing a low tech version of high tech things - like in this case a bunch of magnets stuck to a moving flywheel being used to melt metal similarly to how an induction coil can melt metal - even metal that doesn't normally respond to magnet.

New Magnetic Material Could Boost Electronics

Some materials are magnetic.

Other materials aren't magnetic.

I've seen non-magnetic items changed into being magnetic.

I've even seen magnetic items changed into being non-magnetic.

The idea of having an item changing back and forth from being magnetic to non-magnetic with a simple temperature change is pretty foreign to my experiences, but that's exactly what Ivan Schuller, of the U of California, San Diego has done.

To quote from the article at bbc.com,

The material combines thin layers of nickel and vanadium oxide, creating a structure that is surprisingly responsive to heat.

"We can control the magnetism in just a narrow range of temperature - without applying a magnetic field. And in principle we could also control it with voltage or current," said Prof Schuller.

"At low temperatures, the oxide is an insulator. At high temperatures it's a metal. And in between it becomes this strange material," he said.

Oh, and that's Dr Schuller there to the right. 

Swimming and walking gel

I really don't know how to characterize this video. Yes, there's a clear material there - 'magnetic particles embedded in a polymer', but it's not quite like anything I've seen before.

Admittedly, though, I could probably watch the 'snakes...made from magnetic gel' on a loop for hours.