Yes, you read that right.

Engineers at the University of Cape Town have unveiled the world's first bio-brick grown from human urine, Eyewitness News reports. In general, bio-bricks are created through a natural process called microbial carbonate precipitation, which is similar to how seashells are formed.

In this case, loose sand is colonized with bacteria that produce urease. The urease breaks down the urea in urine while producing calcium carbonate through a complex chemical reaction. The cements the sand into any shape, whether it's a solid column or a rectangular building brick.

The bio-brick is among many recent building materials developed that have been more environmentally focused. Recently, efforts have been made to re-use construction waste to create building materials, re-purpose bottles as building materials, use carrots and concrete as a building material, and develop a self-growing polymer with construction applications.

The Cape Town bio-brick can be molded at room temperature. Potential large-scale applications of the bio-brick are unclear, however the engineers are confident that a sustainable construction material is now possible.

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