What is it? Very good question!!! To my thinking, it is an artists' representation of the Higgs-boson, or God particle. You know, the mysterious missing particle deep within everything that gives it substance. The more scientists know about the nature of the universe, the more they ultimately seek for God. Its nice to know exactly HOW THINGS WORK, but it should not be a one dimensional search. Consider the following verse from the book of Jeremiah.
Jeremiah 29:13 (WEB)
13) You shall seek me, and find me, when you shall search for me with all your heart.
Its OK to intelligently understand the things around us; to know the WHY of things. But, there is more to life than JUST KNOWLEDGE. Consider; what would life in this world be like without love, compassion or for that matter, feelings of any kind? If you memorize the entire Bible and it does not affect you emotionally, what is the point... nothing will change. God wants us to be as smart as we can be, but HE also wants us to know him; to experience the wonder of a life witch has fellowship with HIM. That is the true substance of things... you can call it anything you want.