[BLOG] Some Friday links

• Centauri Dreams’ Paul Gilster writes about long-lived artifacts, such as we or extraterrestrials might make to last for eons.
• Daniel Drezner writes about the ongoing question of what the United States should do in Mali. (Apparently it has to be asked.)
• The Dragon’s Tales links to a study suggesting Titan has an active geology, with its carbon sand filling in craters.
• Far Outliers reports on the fine mechanics of racism in colonial Spanish America.
• The Global Sociology Blog notes the many ways in which the Arab Spring does not resemble protests against same-sex marriage in France.
• Marginal Revolution’s Tyler Cowen speculates that cultural tourism will be more resilient than scenery-oriented tourism, on account of the limits of the digital world.
• Torontoist reports on the call by a group of Toronto physicians for more bike lanes sooner.
• Window on Eurasia notes that, after the 1969 Sino-Soviet clashes, landmarks on the Russian frontier with China were given new Russian names.