Nexus 5 Android version 4.4.4 with 2.0-beta
In the article 'Spherical aberration', scroll down to the image with caption: 'A point source as imaged by...' and click on it.
The Image Gallery displays the image with a long description - there is a vertical scroll bar. Scroll to the end of the article's description - you'll see: §See more.
Note: iOS does not display 'Read more' section for the same image.