Anytime you reach deeper into the unknown than ever before, you should not only wonder about what you’re going to find, but also worry about what sort of demons you might accidentally unearth. In nuclear physics, discovering the internal structure of the atom led to enormous advances, but also brought us the dangers of radioactivity and atomic weapons. In the realm of particle physics, that double-edged sword arises the farther we probe into the high-energy Universe. The better we can explore the previously inaccessible energy frontier, the better we can reveal the high-energy processes that shaped the Universe in its early stages. Many of the mysteries of how our Universe began and evolved from the earliest times can be best investigated by this exact method: colliding particles at higher and higher energies. New particles and rare processes can be revealed through accelerator physics at or beyond the current energy frontiers, but this is not without risk.…