How the brain really works, butterflies

“The key insight: the brain is a multi-layer prediction machine. All neural processing consists of two streams: a bottom-up stream of sense data, and a top-down stream of predictions. These streams interface at each level of processing, comparing themselves to each other and adjusting themselves as necessary.”
http://slatestarcodex.com/2017/09/05/book-review-surfing-uncertainty/

This seems to be rocking my world. There’s an actual theory of how the brain works?

“So we are likely getting more lead, more omega-6 (and relatively less omega-3), and less lithium than people in 1850. If there has been an increase in crime and other undesirable/impulsive behaviors, I think these biological insults are at least as worthy of examination as political changes that have occurred during that time.”
http://slatestarcodex.com/2014/02/18/proposed-biological-explanations-for-historical-trends-in-crime/

…and my brain thought that this (aside from the actual data and science in the article) seems like a very compelling look at the big scale; tiny changes making subtle tidal shifts at the hundreds-of-millions-of-people scale.

Butterflies and radar
http://www.atlasobscura.com/articles/butterfly-blob-mystery-weather-radar

Popped up in an RSS feed today, right before I saw a Cosmopolitan (aka Painted Lady)
https://www.instagram.com/p/BZ4uRfrgYWr/

this afternoon. You do know I have an Instagram account, @cc1315?

Last weekend, at Art of Retreat, I delivered my presentation on the global state of Parkour organization.
http://artofretreat.com/governance/

The report is downloadable as a PDF from
https://parkourforum.world/viewtopic.php?f=6&t=18