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"Gravity waves" sounds technical, but it really just means normal everyday waves, as opposed to sound waves, radio waves etc.

Yes, clouds are aerosols, and produce attractive colours at sunrise and sunset. Not sure about the word "spraying", though, which implies intent.

The standard response to this is that radar and/or cellphone towers are now acting as miniature HAARP transmitters. ;)

I did a search using the first sentence of the introduction on Google Books and it brought up two references but both are only in "snippet view" rather than full text...

Hope this isn't considered off topic, as it is related to member pics posted above. Here is a satellite view of the UK yesterday, late morning. Lots and lots of contrails. Detailed view (250m per pixel) here...

It is a metal, but that has nothing to do with vinegar getting rid of limescale. Limescale is not calcium metal, it is calcium carbonate (which is the same thing, chemically, as chalk and limestone). Vinegar, being an acid, will react with limescale, which is a base (alkali), in the same way...

I haven't been through the link in the OP in great detail, but saying "why don't you just recreate the Apollo hardware?" is ridiculous. It used techniques that are no longer used, anywhere, and it would need to be totally redesigned anyway, because there is no overarching set of blueprints we...

A couple of hours later, facing the other way. A nice illustration of where the routes converge (just west of Reading) to head west. Actually the trail coming in from top centre was Paris to Dublin, and the one from top right was Amsterdam to Willemstad in the Caribbean. Edit: and a...

A very contrail-filled sky this morning.

The photo I use as my avatar is similar. Also a 747 (an Atlas Air cargo flight), but this one was flying towards me, away from the sunset.

A persistent contrail is almost entirely ice that has crystallised out of the air, from water vapour that was already present. Maybe about 1 part in 10,000 or less is water from the exhaust. And out of that 1 part in 10,000, much less than 1% of THAT is solid "pollutants". Virtually all of the...

I don't think that is what that source says. It states that the Latin arbor meant the same as the Old English trêow (i.e. tree), the Latin urtica meant O.E. netle (nettle, still seen today in the scientific name for the nettle genus, Urtica), and so on. See here...

Having made that picture I was wondering whether that simplified textbook would actually mention contrails. It does: http://www.amazon.co.uk/First-Clouds-Weather-Peterson-Guides/dp/0395906636 I'm not too sure about the explanation of the older trails being "curved by the wind", though. Looks...

Very interesting. Certainly looks like something is there on the ground. Has anyone pinned down the location of the videos, to triangulate a position?

I thought I'd "borrow" one of the favourite chemtrail slogans...

Wow, how unfair is that, @JonB? I and several other people have spent several hours of unpaid time (and whatever nonsense anybody spreads about this site, NOBODY is paid for their time here: as a member you know this) trying to explain this issue to you, both on the public thread and in private...

Nice analysis. As you acknowledged, the GFS weather chart suggests the upper winds should have been from the northwest quadrant, not northeast, but I have my doubts about their accuracy. The model runs at pretty low resolution in the upper atmosphere, I believe.

Jon, that is clearly ridiculous. This thread is marked as Debunked, because it is 100% debunked. Whatever your other theories about the Boston bombings, the idea that anything is out of the ordinary about the photos of Jeff Bauman with his legs blown off has been comprehensively disproved, by me...

I just Googled that article. Wow, there are some idiots in the world. The Sandy Hook conspiracy crowd occupy a special circle of hell, in my mind...

Not a bad sunset either. Lots going on here! (Including stray reflections on the glass, unfortunately)