What it looks like: a lead-ion collision in the Large Hadron Collider. Image Source: CERN via BBC.
On November 7, scientists working with the Large Hadron Collider achieved mini Big Bang conditions, generating temperatures a million times hotter than the centre of the Sun. They plan "to learn more about the plasma the Universe was made of a millionth of a second after the Big Bang, 13.7 billion years ago." Report here; main page here.