iWeb Link Problems

I am a high school biology teacher who maintains a blog for my students. I am trying to provide a link to an article from the NASA website:
EO Newsroom: New Images - Duckweed Invasion in Lake Maracaibo

When I publish the blog and click on the link, it appears like this:
http://earthobservatory.nasa.gov/New...g_id%253D16605

I web is treating the "?" as a "%253F"

This link first worked when originally published, it just stopped recently. I have tried multiple times to correct then republish, but it keeps doing the same thing.

You can see the complete page at:Biology

The problem is with the link labeled "Duckweed"

Thanks,
Jeremy