[MichaelGG]

I thought the article was quite clear on this. The more important point is: _Probable causes? In fact, there's no scientific evidence that cellphones, pesticides, global warming or the alleged insufficiency of wildflowers are linked in any way to CCD._

Not knowing recent research on it might be fine. Maybe the articles were in Spanish and hard to find or something. But if the lesson ended up with kids getting concerned and writing letters, and they say "yea we're not sure, it could be some stuff that's unrelated", that sounds like a missed learning opportunity, maybe.

[_delirium]

I don't think the kids are doing too badly on that one, though, because you'd get results not entirely dissimilar if you polled working biologists. CCD is a particularly tricky example because everyone agrees that something is happening, but no causes have proven links. Yet there presumably is some cause or set of causes, so scientists differ in their hypotheses as to what those causes might be. I suspect if you were to poll, you'd find that very few think a link to cell-phone towers is probable, but quite a few think a link to pesticides is probable.