(A) The unique Hamiltonian path in this example is 0 → 1, 1 → 2, 2 → 3, 3 → 4, 4 → 5, 5 → 6. Adapted from ref. 12. Adapted from Scientific American with permission from Andy Christie. (B) A simplified Hamiltonian Path with four cities, where arrows represent flights between the cities. The Hamiltonian Path in this example is Atlanta → Boston → Chicago → Detroit. Created in BioRender. Adapted with permission from Nature (12).