Avoiding negatives you're stuck with

System justification theory is a scientific theory within social psychology that proposes people have a motivation to defend and bolster the status quo, that is, to see it as good, legitimate, and desirable.

According to system justification theory, people not only want to hold favourable attitudes about themselves (ego-justification) and their own groups (group-justification), but they also want to hold favourable attitudes about the overarching social order (system-justification). A consequence of this tendency is that existing social, economic, and political arrangements tend to be preferred, and alternatives to the status quo are disparaged.
[Wikipedia]

Johnson and Fujita took this a step further to investigate whether people's willingness to see negative information about a system was related to their perception of the systems changeability.  The idea being that if a system was believed to be unalterable people wouldn't want to know about its downside - so avoid a locked-in feeling - but if the system was perceived to be changeable, then they wouldn't avoid negative information.

Result: Yes.  People avoid negative information about systems they believe cannot be changed.

http://pss.sagepub.com/content/23/2/133

Zoom everything

This is pretty cool: how big stuff is zoom from the biggest to smallest:

http://htwins.net/scale2/

Testosterone promotes abstract thought

Testosterone levels during development has been associated with increased risk taking, various physical abilities, and digit length ratios.  This new research also find it also correlates with capacity for abstract thought (measured with Raven's Progressive Matrices).

Organizing Effects of Testosterone and Economic Behavior: Not Just Risk Taking
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0029842