In many cases, you don't need to click on a link to learn something. Simply moving your mouse over some links and images can cause an informational flag to pop up. This can help your readers decide whether they want to click on a particular link in effect, giving them a preview of what they might find if they did click on it. Even better, it is relatively easy to create informational flags:

Figure 1: An informational flag that appears when moving a mouse cursor over an image
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