Liquid Universe

In the beginning--or to be precise, a trillionth of a trillionth of a trillionth of a second after the Big Bang--the universe was a seething, unimaginably hot ball of energy. The forces that we know-- gravity, electromagnetism, and the strong and weak forces that govern atoms--were still joined as one. But in an instant, this sea of energy changed. Much as water abruptly turns to ice, the universe crossed a temperature threshold and the universal force fragmented.