Studies Show That Brown Eyes Are Perceived To Be More Trustworthy Than Blue Eyes

A study on how the color of the eyes influence perception of trustworthiness showed that people tend to trust brown eyed people over the blue eyed.

The human brain interprets another person's face and expression to identify origin, emotional tendencies, health qualities, and some social information. This is called face perception. How the brain interprets the face would dictate how to socially interact with the person.

Face perception is domain specific, heritable and independent of the person's cognitive abilities. But it is influenced by environment, ethnicity, and to some extent, culture.

This process is highly adaptive in any social environment, especially for distinguishing a friend from a foe. Face perception provides information on the person's level of trustworthiness which helps the person succeed socially, economically, and in terms of extending his race, reproductively.

The amygdala (the part of the brain that is responsible for the "fight or flight" response) reacts to the information and sends the appropriate signal whether the person can be trusted or not. People with bilateral amygdala damage have problems judging a person's face and ultimately the person's trustworthiness.

The brain picks up many features of the face to process face perception. One part of the face that seems to have influence over how the face is interpreted are the eyes.

Queen Sweat Bees Manipulate Role Of Female Brood

Research shows that the queen sweat bee determines the role of the female brood by controlling its food. First generations of the nest are restricted food so that the bees will grow to be workers rather than reproducers.

The sweat bee, Halictus scabiosae, is a common bee throughout the world except Australia and Southeast Asia. They are named sweat bees because of their attraction to human sweat, specifically the salt in the sweat.]

The bees are small in size (about 1/4 to 1/2 inch or 4-10 mm). And are known to sting when agitated. The pain of a sweat bee sting is minor but can be complicated and even deadly to persons allergic to bee stings.

Most bees in the Halictid family forage and are active at dusk or in the early evening. Also, their social structure is considered "eusocial".

A eusocial system is characterized by three things:

1. Cooperative brood care - The whole nest help in caring for the young.
2. Overlapping adult generations - The nest is composed of different generations
3. Division of labor - work responsibilities in the nest are distributed among the population based on reproductive capabilities.