Tuesday’s links talk blogs, music and global health.
Walking Around: Put on a blindfold and try to walk in a perfectly straight line. You won’t be able to do it. Why do humans keep walking in circles? (NPR)
Blog Stars: Boing Boing is one of the most popular, profitable blogs online. Here’s the secret behind its success. (Fast Company)
Road to Fame: One actor took a one-line part on The Sopranos, parlayed it into viral-video fame, and parlayed that into a big part on Boardwalk Empire. (Vulture)
Data Explained: Using a gorgeous video graphic, Hans Rosling tracks the income and health of 200 countries over the past 200 years — and makes it fascinating. (The Daily What)
Mystery Men: After Sean Connery left his iconic role of James Bond, five top candidates posed for audition photos. They’re classic and awkward simultaneously. (LIFE)
Elsewhere on TIME.com: Sarah Palin raised nearly $500,000 for her PAC — in this month alone. Why? Swampland has the scoop.
Must See: The chorus at P.S. 22, those elementary-school YouTube darlings, sang “Can’t Get You Out of My Head,” featuring pop star Kylie Minogue herself.