Q: Given a scientific passage and an answer, generate a question for the given answer.
Passage: Everyday objects are made up of quarks from the lowest energy family, namely up and down quarks. Quarks in the middle energy family are found in cosmic rays and are produced in particle accelerators. Particles in the high energy family are believed to have existed briefly during the earliest moments of the Big Bang and are created only in high energy collisions. Answer: particle accelerators
A:
Quarks in the middle energy family are found in cosmic rays and are produced in what?