single post continues to refresh (multiple server requests)

Hello,

I upgraded WP recently (3.9.2) and just noticed that single post and product pages keep refreshing automatically. I can stop that from happening by stopping the page from loading again using my browser’s stop loading button, but I would rather correct the problem permanently. Any suggestions? Here is a single post: http://www.darwinodi.com/la-busqueda-de-la-verdad-cientifica/