As the universe expanded, it also grew much cooler. Right after the Big Bang, the universe was hotter than all of Dante’s infernos put together, and this incredible heat prevented the formation of matter. As the universe cooled, energy began to be converted to matter according to Einstein’s famous formula E = mc2. As Einstein discovered, a quantity of energy can be converted into a particle of matter (and its mass, m, will be equal to the quantity of energy, E, divided by the speed of light, c, squared). From this point on, the history of the universe is a long ascension toward complexity.

As the universe expanded, it also grew much cooler. Right after the
Big Bang, the universe was hotter than all of Dante’s infernos put
together, and this incredible heat prevented the formation of matter. As
the universe cooled, energy began to be converted to matter according to
Einstein’s famous formula E = mc2. As Einstein discovered, a quantity of
energy can be converted into a particle of matter (and its mass, m, will be
equal to the quantity of energy, E, divided by the speed of light, c,
squared). From this point on, the history of the universe is a long ascension
toward complexity.