Wow! 2,443 Authors?

First time in my life I encounter a paper written by 2,443 authors (scientists). This unimaginable. Well, I think for large collaborative research such as the one being done in CERN, then I guess it is just natural to have thousands of authors for a paper.

Here's the paper (if you want to read it):

Alignment of the CMS Silicon Tracker during Commissioning with Cosmic Rays

Imagine what a collaboration can do? I have high respect for any task, job, project, program conducted through collaboration.