The subway, the train, the T, the underground, the metro, the tube-whatever you call it, it's how we get around. Boston's happens to be the first, and when one has the world's most ancient subway system, it's easy to dismiss it as old news. But the MBTA has a big birthday this year, and it deserves its rightful centennial celebration. For the week, we played "I Spy." This is what we saw.

As part of our Housing Market series, we'll be posting reviews and rankings for each of Harvard's 12 residential Houses over the next few days. Click here to read more about the series. Nestled snugly between Harvard Square shops and restaurants, Adams House, incorporated in 1931, is the oldest of the Harvard Houses and also the closest House to the Yard. Most of the buildings of Adams House were built as Gold Coast dormitories at the turn of the century to provide rich Harvard undergraduates with a luxurious alternative to the antiquated Yard dorms. In previous years, Adams has dominated the House rankings due to its superb location and beauty.

The Chickwich Challenge has been called many things: legendary, the pinnacle of competitive eating and athleticism, disgusting.

If you happened to have passed by Brattle Street today, you may have noticed a cluster of multicolored post-it notes brightening the windows of an empty storefront. In response to the words "Who inspires you?" written in bold black sharpie, the post-it notes express gratitude for a range of beloved people and things. If you're looking for a pick-me-up, these 3x3 inch squares may do the trick.

Don't pack away those winter coats yet! This morning, Punxsutawney Phil, the famous groundhog-cum-weather prognosticator, emerged from his hole and saw his shadow. According to Groundhog Day lore, there will be six more weeks of winter.