Questions with the keyword 'material'

• what would you build a laser gun out of by dan33 to Cathy, Jaz, Mark, Roma, Rory Comments: (so far, 4s comments )
• I know that crystals have specialised cells so could you actually manage to make a man made one? Can you Somehow by onleethebrave to Cathy, Jaz, Mark, Roma, Rory Comments: (No comments so far )
• what go you make bridges out of by dan33 to Roma Comments: (No comments so far )
• can you turn waste back to its original form by haron338 to Mark Comments: (So far, one comment )