Markus Kayser's Solar Sinter project is a printer that uses solar power as raw energy to heat up sand and form 3D glass objects. A laser cutter is also powered by solar energy.
Solar-sintering aims to raise questions about the future of manufacturing and triggers dreams of the full utilisation of the production potential of the world’s most efficient energy resource - the sun.
The video above shows the project being tested in the Egyptian desert where sand and sun are both abundant.
Link - Via Boing Boing