Futuristic City in Protective Sphere on the Surface of the Planet Mars

Blood Bricks

Look: Future colonies on Mars could be built with human blood

When combined with other materials, it makes surprisingly strong bricks.

Mark Stevenson/Collection Mix: Subjects/Getty Images

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For all the glitzy depictions of future Mars civilizations, there’s one glaring problem:

How do we even begin to build a city on Mars?

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Transporting a single brick from Earth to Mars is estimated to cost as much as 2 million dollars.

Imagine what it’d cost to build a research station — or just a modest space to sleep.