Austin Bourdon has worked in Ted Bunn’s research group for the past two summers, examining a bunch of possible explanations for some unexplained features in maps of the cosmic microwave background radiation. He presented his work in a poster at a meeting of the American Astronomical Society in Denver this summer, and he is coauthor on a paper recently submitted to the journal Physical Review D. Bunn wrote more about this on his blog, and you can see the paper here.