First, from https://www.rhino3d.com/download -
if one clicks on the “Zoo” link, it leads to the Zoo home page on the wiki:
https://wiki.mcneel.com/zoo/home
Then you have to find the download link on that page to download. While I understand you want to inform people on what the Zoo is, it seems like when coming from the McNeel “Download” page, the link should go directly to the Zoo download page.
Second, once on the Zoo download page:
Clicking on the “Read change log” link gets me to this page:
i.e. a blank page…
–Mitch