The most expensive human catapult, modern sunflowers and the world’s only woolly mammoth
April 12th, 2012The problem with the possibility of having a giant radio telescope in your back garden is that you find it difficult to look at anything else. It is unashamedly ego-centric but the Square Kilometre Array has eclipsed everything else that was happening. (Writing a book about the SKA definitely hasn’t helped the radio telescope navel-gazing and tea-leaf reading.)
Following the latest delay, I looked up and realised that there was life in the rest of the scientific world. So, here are some sound bites of what’s been happening in the past month or two:
BACK FROM THE DEAD
In March, South Korea and Russia signed a deal to clone a woolly mammoth. Can you hear the Jurassic Park theme tune in your head? But this endeavour isn’t as scientifically dubious as extracting blood from a mosquito; they actually have the remains of a mammoth. In many cases, mammoth remains don’t actually fossilise (turn to stone), but are preserved in an organic state because of the intense cold. That means it may be possible to extract cells from undamaged tissue, which will probably be the most difficult part. These will then be cloned with elephant cells. Well, that is what the scientists think will be the most difficult part. However, there are down stream practicalities: where do you keep a 2m to 3m high woolly mammoth? And if they do manage to do it, it will be the only woolly mammoth in the world, a rather sad and pathetic life for an animal which – if it is socially similar to its elephant brethren – usually lives with its family.
TO INFINITY AND BEYOND
You think space craft, you think rockets. How else could we propel hundreds of kilograms into space? Well, the Startram Project thinks they have a better idea. Possibly the most expensive and insane catapult science fiction writers have come up with: accelerating spacecraft using magnets. They say that it all starts maglev technology.
Shanghai has the world’s first commercial high-speed maglev train, which stands for magnetic levitation. The line is 35km long, running from Shanghai to Shanghai Pudong International Airport, and the trip takes less than eight minutes. With large magnets on its undercarriage, the magnetised tracks cause the train to levitate 1cm to 10cm above the track. Yup, that’s right: a flying train.
It has no moving parts, which means no wear and tear, and is propelled down the track using electromagnetism, which is when an electrical current is used to create a magnetic field. So there is no friction and the only thing standing between silly-fast and stupid-fast is air resistance. The highest recorded speed of a Maglev train is a toe-curling 581km/h, while Shanghai’s achieves a top speed of 431km/h. In practical terms, Shanghai’s Maglev could take you around the world, at the equator, in less than four days.
There is of course the challenge of how to start moving without giving commuters whiplash and how to turn corners without plastering them to the sides of the carriage.
The Startram Project says that it would be possible – this is all somewhat hypothetical – to accelerate a spacecraft in a magnetised tunnel and spit it out into space; in other words, a very expensive canon where you are the ball. Perhaps that is why the Startram Project estimates that a people-capable version could be built for $60bn and be built within 20 years. You need a good couple of years to figure out how you can avoid your customers being pasted across the windscreen of the spacecraft. This is where we move into the realm of strait-jacket fast.
THE MODERN SUNFLOWER
It all sounded really exciting until I saw what it was called. Artemis Innovation Management Solutions has been given money by Nasa to build a satellite than can collect energy from the Sun’s rays and beam it back to Earth. It looks like a large tulip in space, made out of small reflective mirrors which would channel sunlight to small solar panels. The solar cells would convert the energy into microwaves which would then be broadcast back to an Earth-bound receiving station.
If you think people are upset about the possible electromagnetic radiation from cellphone towers, take a moment and picture the anti-solar-microwave-radiation lobby.
It could also be built piece-meal, which means that all the components could be transported using existing spacecraft technology and assembled in space. The Nasa money is seed funding to prove the concept and see whether it is feasible. Unfortunately it is called the Solar Power Satellite via Arbitrary Large PHased Array, or SPS-ALPHA. It may be a personal preference, but nothing that costs that much money should ever have the word “arbitrary” in the title. It should rather be the SPS via Very-Well-Thought-Out-And-Meticulously-Planned Large PHased Array.