Twilight zone twilight
![Harvard Square at](https://news.harvard.edu/gazette/wp-content/uploads/2003/11/01-feature2-225-2.jpg)
Whether the result of a solar flare, the nearness of Halloween, or the lustrous alchemy of cloud, setting sun, and October light, the coming of dusk on Oct. 29 turned Harvard Square into a luminous spectacle.
Photo gallery: In the gloaming