http://www.techtimes.com/articles/36290/20150228/arhgap11b-gene-makes-human-brain-bigger-here-are-other-studies-that-show-differences-between-us-and-primates.htm Day 293 has 36 protein-coding genes (browser view) including ARHGAP11B (Rho GTPase activating protein 11B).
ARHGAP11B is a copy of the nearby ARHGAP11A that appeared during human evolution. Putting this gene into mice causes them to develop more elaborate brains.
Day 293 is also the home to the SNP responsible for blue eyes.
Click here to see all 8499265 letters of Day 293 with ARHGAP11B underlined.