Water is scarce on Mars and it costs $2 million to send a single brick to the Red Planet, according to estimates. But astronauts can simply make their own concrete on-site using Martian dust and their own blood, according to findings published this month in the journal Materials Today Bio...
The blood-and-dust mixture alone is equivalent to concrete, but researchers say it becomes even stronger when human urea is added to the mix...
Roberts and his team say that animal blood could eventually replace human blood in Martian construction projects, but that would only happen after we send cows to Mars.

Perhaps, thus the ‘zero-gravity’ toilet instruction is the only intentional joke in the film. In a scene aboard the space station, Floyd is seen peering at a detailed and convoluted instruction manual on the use of the zero-gravity toilet. Kubrick’s disdain of instructions for the understanding of the film highlights the irony of a page long instructions from the zero-gravity toilets. In an interview, Kubrick’s explained the zero-gravity toilet was the only intentional joke in the film. That evolution and technological advancement would lead to convoluting of tending to basic human needs is well worth a snigger. Despite its ambiguity, Kubrick doesn’t “want to spell out a verbal roadmap for 2001”. Kubrick’s film doesn’t come with an instruction manual, but the zero-gravity toilet does.

The first moon tourists will enjoy comfortable earth-style living in a tri-level underground resort. Bottom level will contain mechanical equipment and the center level will consist of two 400 feet guest corridors containing 100 rooms. Top level will be for public space.

Hilton said the three floors will eliminate elevators and should minimize power requirements. Multi-story underground moon hotels will come later.

Guest rooms will have wall-to-wall television for closed circuitry views of space and to receive programs from earth. A nuclear reactor kitchen will prepare dehydrated freeze dry foods. Cleaning will be done by small laser units.

The Lunar Hilton's most popular spot will probably be the Galaxy Lounge where thermopane windows will provide a view of outer space and earth. Pre-measured, pre-cooled, "instant" drinks will be served by push buttons.