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Looking at that last photo I would say they do look purely aerodynamic. And I think you are right about the interaction with the wing vortices being responsible for the asymmetry. The wing vortices would have opposite "handedness" on either side of the plane, as the wings are mirror images...

But surely even someone who knows nothing about science would see that it is nonsense that "ice crystals are invisible and only become visible once they turn into a gas"? Maybe I am just being hopelessly over optimistic again...

There is a fundamental difference between temperature and heat. Temperature is a measure of how much energy individual particles have. Heat is a measure of how much energy is contained by all the particles in a given volume. The thermosphere is a very low density gas (very few particles) so...

A more recent paper is here. It still quotes the Antelman patent, suggesting that this is the only tetrasil (or "silver oxide hydrosol", as it is called here) study with AIDS patients in vivo...

It's a long time since my chemistry degree, but this idea of "nano electrocution" sounds very specious. The idea seems to be that electrons will pass from an Ag(I) atom to an Ag(III) atom in the crystal lattice, via the cell wall of the virus. I've had a quick look through the literature and the...

How is that different from this patent, which claims to be a "life-saving innovation which utilizes Mind controls/Voice activated Satellite Technology to cure HIV disease of the Soul"? http://www.google.com/patents/US20140039420 Both are claims. Both are totally unproven. Well actually it...

Trying to pin down the location. Strange Google Translation issue here: Foshan TV also reported yesterday, referring to receive public rebellion, the day before yesterday in Foshan Avenue and Quebec Church Road junction, the sky suddenly appeared a mirage "Quebec Church Road" is actually 魁奇路...

This person has clearly swallowed the "high-bypass jet engines cannot make contrails" idea, originated by Russ Tanner and Jack Baran. I have had this repeated to me as "fact" countless times. As Russ Tanner claims here: It's such a ludicrous claim, but there seems to be no shortage of people...

An rather unusual one this afternoon in London. I didn't see the earlier stages but presumably this was the result of Crow instability. According to the EXIF data I took the photo at 2.25pm BST (13.25 UTC) and the trail runs more or less east-west (camera facing roughly southeast). This seems...

Different cities. The "cranes" in the Chengde one are utility poles or light poles, I think. And the buildings are different shapes, albeit in the standard Chinese tower block style :) It's a shame there is no Street View in these places. I had a look at Panoramio pictures of Chengde but...

Interesting that the "video" is just a series of still images, with panning effects applied. And apparently identical buildings (the large tower blocks) are shown at very different heights in the sky. Edit: the photos are shown in their entirety here...

This video includes more apparently fake images from various locations, but also includes this image which appears to be real, but not a mirage: This appears to be a shadow cast by a tower (with the sun behind it) onto low cloud or mist.

It's much too high in the sky. I think that part is simply CGI. I was looking into this just the other day. There's another version of the video doing the rounds which includes snippets of a totally different video, filmed in Huangshan back in 2011. (The "above clouds" example quoted by Mick...

Perhaps some contrails here in 1986; certainly lots of "suspicious" cirrus. http://www.panoramio.com/photo/61631236

Nice of them to include a swimming pool for the inmates. Or is that the governor's house?

Apparently the OVERCAST movie has now been shown, at a film festival in Innsbruck. https://www.facebook.com/permalink.php?story_fbid=527641100725807&id=142678639222057 This was the festival: http://www.inff.eu/en/ Here is the winners list...

You could argue that you shouldn't give them floor time (I disagree, but never mind!) But if you do give them floor time, you need to make sure that you can and do rebut their arguments at the time. Otherwise, the videos of them presenting their bunk unchallenged just appear to bolster their...

This is the act that led to the creation of the board: http://www.legis.state.pa.us/WU01/LI/LI/US/PDF/1967/0/0449..PDF Presumably Hill was one of the "three members" in part (5). It still seems strange that someone with a conspiracy-minded view of cloud seeding should be appointed.

It does seem very odd to me that Edmund Hill was a member of the Pennsylvania Weather Modification Board - which, you would hope, knew about the real science of cloud seeding - and yet at the same time was also a vocal member of the anti-cloud-seeding Tri-State association. From the 1980...

Edmund R. Hill, vice-president of the Tri-State Natural Weather Association (post #7), died in 1988: https://news.google.com/newspapers?nid=2202&dat=19881114&id=EdYlAAAAIBAJ&sjid=MP0FAAAAIBAJ&pg=5053,2794497&hl=en According to that, he was quite an academic. The secretary, William Lewis...