@naotoj Roads? Where we're going we don't need roads. http://twitter.com/Doc__Brown/statuses/3463688752 Back to the FutureのDoc.

に似ている。という説があるらしい。 Hardcore runners who can't bear to skip a workout may be hooked in a way that's similar to heroin addiction, according to a new study of rats. The well-known "runner's high" may be the culprit: Human runn…