>>>My son is now studying the subject of Biology (from a correspondence course, from the USA). Nice, very detailed explanations; lots of pictures in full color.
>>>
>>>Now he is studying the chapter on DNA, several pictures and models of the DNA molecule are shown - all of them a right-handed double helix. Again in full color, of course.
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>>Update: Sorry, I thought it was always supposed to be left-handed, but a quick look at the Wikipedia shows me that I'll have to update my studies on this. :(
>>
>>Somewhere there must be a left-handedness, which I read about a while ago. I guess I have confused some things here.
>
>Sorry, Hilmar. You're telling us this why?

He thought the text book either was wrong, or had reversed the images accidentally.