Infrared photography declining in popularity?

Google's Web Trends is an interesting facility. It tracks the traffic for search terms and can give you an indication of something's popularity.

Here's the result for Infrared Photography. Nothing of any use before 2007 but a slight decline since the end of 2006. But why the spikes in interest in October 2007 and January 2010? The spike in January was just before Phil Coomes ran a story about the centenary on the BBC web site. You'll notice that there's most interest in the far east: Philippines, Singapore and Indonesia as top three regions. USA is 6th and the UK is 10th below Australia, NZ and Canada. I'm not sure what all this really means but it's curious nonetheless.

The graph of news items shows a dramatic peak around August 2008. Again ... why might that be?

The Google graph is showing a slow declining trend. Is that because less people are interested in infrared photography or could it be that those people who used to ask how to do it now know and don't need to look it up any more. Or maybe it means nothing. Oh, and while you're at it, try 'Lady Gaga' as a search term.