No, it's a matter of *view* size
As the commenter above stated, the blurriness is due to the original images being shrunken to fit into the avaialble space on the page, not due to the images themselves. When you click on the images in the article, you are taken to a page with JUST the image itself, in its original dimensions and they are crystal-clear. If you right-click each image to compare the dimensions, you'll see that they are all smaller in the article (some by only a few pixels) than they are when viewed individually.