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Comment by rjbwork | Hacker News Reader

You can. He has some other videos where he actually does extract the iron and ~~makes a knife out of it.~~ makes a forgeable chunk.

https://www.youtube.com/watch?v=RZGAYzItazw

https://www.youtube.com/watch?v=OPIUMpiV0IY

https://www.youtube.com/watch?v=pOj4L9yp7Mc

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In the first link, I understood better many things about human history... Still the guy does not sweat in front of a furnace. Obviously irrelevant, but strange!

As someone who has fought wildfire before, I personally found that sweat does not accumulate in front of a source of heat. You start to feel damp or wet after you walk away from the heat. Perhaps it is the same with a hot furnace.

I think he's probably sweating, but the sweat evaporates faster than it can bead up. Or maybe he's dehydrated.. I have wondered what the "behind the scenes" of his videos looks like; when he goes out into the woods does he bring modern water bottles and pack a lunch?

He does have a video about using "cane" to make a water filter: https://www.youtube.com/watch?v=nG-rNHgFxhs

> when he goes out into the woods does he bring modern water bottles and pack a lunch?

The wilderness he films these in is a 15 minute walk from his house: https://www.reddit.com/r/IAmA/comments/dq0zec/im_john_plant_...

so he doesn't really bring anything with him https://www.reddit.com/r/IAmA/comments/dq0zec/im_john_plant_...

hot, dry air has a tendency to evaporate water.

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