The Winners of the MR Challenge

As expected, President Bush’s plan for a moon base and eventual trip to Mars failed to ignite. MR readers have some better ideas.

Honorable mention goes to Roger Meiners for suggesting that a moon base is a good idea so long as Congress and the President must occupy it. Now I am inspired!

Third place goes to Chris Rasch for brain freezing. Chris Rasch writes “I believe that reversible cryopreservation of the human brain could be developed. Remarkable advances have already been made on a shoestring budget. Such a technology would allow people dying today to halt the dying process until technology can advance to the point that we can cure their disease or repair their injuries. I would wager that, for a mere billion dollars, which is far more than has probably been spent on cryobiology during the entire existence of the field, we could have effectively unbounded lifespans. We could then use those extra years to pursue all of the other goals that other submitters may send to you.”

Here is a good, short summary of cryonics and you can sign up to have you brain (or more) frozen here.

I like the cryonics idea and have thought seriously about signing up (believe it or not, one of my colleagues (not Tyler) has already done so). The reason the idea takes third place is that we don’t see a big private demand for cryonics and the public is more likely to think this idea crazy than inspiring.

Second place goes to Nick Shultz for suggesting that we “provide potable water for everyone on the planet.” A number of other ideas were also motivated by the goal of alleviating abject third-world poverty. I think these ideas are inspiring but am unsure whether we can deliver on them given that so many of the problems of the third world have to do with poor governance. My suggestion would be to work on something related but more under our own control. We could do far worse, for example, than following Bill Gates’s lead and put a billion or so into the Malaria Vaccine Initiative.

First place goes to David Wood and Robin Hanson both of whom suggested a space elevator. At first, the space elevator idea seems impossible, even absurd. The idea is to string a cable some 62,000 miles long from a spot on the equator up into outerspace. Wouldn’t it fall down? No, recall that a sateillite some 22,000 miles up is in geosynchronous orbit. The space elevator would extend enough past this point so that gravity at the lower end and centripetal acceleration at the far end would keep the cable under tension. Once the cable is strung, reaching outerspace is as simple as Jack climbing the beanstock.

The most difficult part of the space elevator is finding a material strong enough to carry a load yet light enough not to collapse under its own weight – a short time ago there was no such material but today it’s believed that carbon nanotubes could do the job (nano-technology more generally was another favourite of MR readers and this proposal would advance that cause.)

A space elevator is a game-changer because it dramatically lowers the cost of putting payloads into space. Moreover, once you have one elevator it becomes much easier to get a second. In contrast, rockets are always going to be expensive because you have to carry a lot of fuel just to lift the fuel and sitting on top of 4 million pounds of explosive is always going to be dangerous. The space elevator would provide a permanent access point to the stars and it can be had for less than 100 billion. Going up anyone?

More on the space elevator idea here and here.


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