Beware of Online Filter Bubbles

A TED presentation by Eli Pariser. I knew that Chinese authorities exerted control over search results from Google and other search engines, but it turns out that ALL Google search results are being manipulated based on who and where you are! There are long-standing debates about whether society as a whole is losing perspective as media become more narrow and specialized. Wholesale filtering of search results is much more pernicious and therefore much more dangerous. His Egypt example is pretty scary. Brings new meaning to the word “cocooning”!

“What we’re seeing is the passing of the torch from human gatekeepers to algorithmic ones.”

He uses the apt metaphor of the balanced information diet and the difference between what we want to see versus what we need to see. It would be nice if in addition to “I’m Feeling Lucky” Google gave us a button to “Give It To Me Straight!”

Update: There has been much criticism of Pariser after I posted this. It appears that he may have exaggerated how nonporous these “bubbles” are. So apparently we still have the good old, leaky Internet we’ve all come to know and love. 🙂

Sailing My Canoe for the First Time

And now for something completely different… sailing my canoe! I bought a kit which arrived yesterday. It adds a mast, lateen sail, stabilizers, side-boards, and a steering oar.

The rig was very responsive in light airs; made forward progress with almost undetectable wind. Got a few 3mph “gusts”, which were enough to heel the boat. Overall, a very good first impression!

 


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Human Capacity for Killing at a Distance

Source: duke.edu

Anthropologist Steven Churchill from Duke University recently gave a fascinating lecture [listen] on the discovery of projectile weapons by early Homo sapiens and subsequent effects on large carnivores (extinction!) and human evolution.

His basic premise is that sometime in the past 250,000 years humans discovered how to kill at a distance. This allowed us to crowd-out the various carnivore “gilds” including our co-evolved cousins the Neanderthals. In this photo he holds a spear-throwing projectile weapon (atlatl) in his right hand and a reproduction of a Neanderthal thrusting spear in his left.

These weapons have also had a profound effect on modern human conflicts. When we fight with thrusting weapons, the probability of injury is a linear function of the number of combatants: 0.5 with two on one, 0.33 with three on one, 0.25 with four on one, etc. So the strategy is to bring lots of friends to a fight! With projectile weapons and the function becomes exponential with the probability of injury decreasing by the square: 0.25 with two on one, 0.11 with three on one, and 0.06 with four to one!