Random links

What should we be worried about? Unknown Unknowns
An interesting response to one of Edge's questions: "There are known knowns and known unknowns, but what we should be worried about most is the unknown unknowns. Not because they are the most serious risks we face, but because psychology tells us that unclear risks that are in the distant future are the risks we are less likely to take seriously enough."
The return of Africa's strongmen
"spreading democracy isn’t as simple as dangling aid and applauding elections, democratization experts say. Even hopeful cases like Ghana and Benin must confront long histories of military rule woven into their political evolution. ... Despite rapid economic growth, Africa’s civic institutions remain weak, struggling to provide basic services. ... Against this backdrop of weak state capacity, African armies stand out for the manpower and funding they enjoy."
Put your clothes back on: Oversharing online isn't wise
A quote from Roxanne Stone in the article: "There is power in sharing one’s life online, but there is even more power in sharing it with those you love. It is possible to be authentic online and inauthentic in your real life. I didn’t want to enable that."
New amazing metal is so hydrophobic it makes water bounce like magic
"Instead of using chemical coatings they used lasers to etch a nanostructure on the metal itself. It will not wear off, like current less effective methods." Interesting if it really works.