Popularity decay in immersion
There seems to be something a bit strange going on with the popularity algorithm in immersion (at least in the French section). As far as I'm aware, the algorithm for popularity is based on time since upload and number of up votes.
However, the order seems to be a bit strange now. For example, the article on Enceladus (http://www.duolingo.com/translation/35b1ff251912e4589e80b416116e7d96) and the article on Perfume (http://www.duolingo.com/translation/3e407f4414e4f8c943dcb2c70b2eeab7) appear below the article on Stoicism (http://www.duolingo.com/translation/ec267522c2d5a3a9a3e14d3b04743ad6), yet they have more up votes and were posted a shorter time ago. There are other examples as well. It would be great if someone could take a look into this. Thanks!