Davis, California - Women assigned an overweight avatar in a video tennis game didn’t play as hard as those assigned a slim one - regardless of the player’s actual size, according to a new study by the University of California, Davis.

Berkeley, California - By the numbers, “contemporary terrorism is disproportionately Islamist,” writes Steven Fish, author of Are Muslims Distinctive? A Look at the Evidence. And many Muslims “express regret rather than revulsion over murder in the name of their faith,” he adds.

Berkeley, California - Archaeologists continue to debate the reasons for the collapse of many Central American cities and states, from Teotihuacan in Mexico to the Yucatan Maya, and climate change is considered one of the major causes.

Cambridge, Massachusetts - For MIT senior Shannon Kao, expert storytelling is essential, even - if not especially - when it comes to coding. The computer science major relies on narrative everywhere from her science fiction writing to her research on educational computer games at the MIT Media Lab - and it all stems from a childhood replete with books.

Cambridge, Massachusetts - It’s early afternoon on Friday, January 16. On the third floor of MIT’s Building 34, three classrooms are buzzing with excitement. This is the assigned home base for Team PuzzFeed, whose members are clustered at round tables, refreshing their laptop screens impatiently. They’re waiting for 1:17 p.m. - the slated start time for the 2015 MIT Mystery Hunt. “It’s up!” someone shouts, and the team cheers as the first puzzles load online.

Cambridge, Massachusetts - Optimization algorithms, which try to find the minimum values of mathematical functions, are everywhere in engineering. Among other things, they’re used to evaluate design tradeoffs, to assess control systems, and to find patterns in data.