This is pretty great a 3d printer that uses the power of the sun to both run it electronics but also via a very large lens as it's heat element it takes in sand and then with just the power of the sun can fuse it into 3d objects
resolution isn't wonderful but it is a wonderful bit of design
Comments
can I borrow this? I want to use it to colonise the moon.
It's a lovely idea. Doe they have to scrape the sand for each layer? If so, it looks like the sort of thing that could be automated. Sand is a pretty predictable sort of solid.