What's a great research direction?

I have been looking for a good research direction some time ago. Today I am reading an article on the science internet to study the physiological functions of emotices.

Why do we raise our eyebrows, drop our eyes, and have big nostrils when we are in fear? When we hate it, we frown, turn our lips, and blink our eyes, just like when we smell the rotten eggs? Canadian scientists have recently discovered that expressions are not only used for communication, but may also help us better cope with survival risks.

Through computer synthesis and volunteer imitation, researchers found that expressions of fear can improve peripheral vision, accelerate eye movement, and promote air flow, it can potentially make people feel dangerous and respond more quickly. A nasty expression has the opposite effect, which limits vision and reduces air flow, to prevent harmful things from hurting your eyes or lungs.

Most studies on emotices focus on their communication functions, rather than the basis of physiology or evolution. Elizabeth Phelps, a neuroscientist at New York University, said: "No one has demonstrated this in a scientific way ." Kevin Ochsner, a cognitive neuroscientist at Columbia University, said: "It is obvious that this is the best research that has never been proved before ."

From: http://www.sciencenet.cn/htmlnews/2008/6/207997.html

Http://www.nature.com/neuro/journal/vaop/ncurrent/abs/nn.2138.html