Burning steel wool - GIF

[Altair]

Burning steel wool increases its mass.




Previously:

Elemental gases in front of a Tesla coil - GIF
Gallium in water - GIF
Floating an anvil in liquid mercury - video
Putting out a magnesium fire with water - GIF

[neilbourjaily]

Your rusty nails weigh more than your clean ones.

[VinnieL]

We used to shoot wads of it out of a homemade black powder cannon. It would come out like a Roman Candle. Set Dad's strawberry patch (which had been mulched with leaves) on fire.

[nova_robotics]

Your rusty nails weigh more than your clean ones.

You breathe out more than you breathe in.