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Monday, August 05, 2002

Crop circle rubbish

How can some people still be taking crop circles seriously? Why do so few journalists have the courage to say flat out that crop circles are the product of overactive practical jokers?

We know that crop circles are made by people - the people who make them admit to it. We know it is easy to make them - just follow the instructions on any of the easy-to-find websites.

The only things keeping the story alive are the ridiculous pseudo-arguments that sustain the "moon-landing is a myth" crazies. Just as in that case, there are perfectly acceptable explanations for crop circles (people make them) and the pseudo-scientific claims made by crop-circle worshippers are easily dismissed (no, winds couldn't create them; no, the fact that they are geometric does not imply that they have some deeper meaning).

Actually, there is another reason the story is still alive - so-called "journalists" who aren't prepared to examine the arguments in even the slightest depth and who confuse open-mindedness with starry-eyed acceptance.

Or maybe all the hype is just seeded by Hollywood for the film. That's the only conspiracy theory I'm prepared to believe...

Review of anti-gravity book

Salon has a review of Nick Cook's book about anti-gravity research. This book and articles by the author are what restarted all the recent anti-gravity hype. However, the laws of physics haven't changed recently - anti-gravity still isn't possible...

Previous comments: Anti-gravity schemes persist

Sonic levitation tricks

Physicists have levitated the densest solid and liquid (iridium and mercury) using ultrasound. Wen-Jun Xie at China's Northwestern Polytechnical University and colleagues report in an upcoming issue of Physical Review Letters that they used a clever geometry of sound waves to levitate gram sized samples of iridium and mercury.

Being able to levitate objects acoustically means that you can do experiments with substances that are corrosive, high-temperature, susceptible to contamination or influence from containers, etc.

The technique is limited to samples that are about half the wavelength of the ultrasound so we won't be hearing about humans flying around any time soon...

Some pictures from an older experiment


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