Suppose the Barr family sets out on
a trip southward from their home in Delaware» and, while hearing a brief introductory lecture on the proper meaning of randomness, the children start writing down the state of each passing license plate.
Each October, as the northern ice pushes
southward, small groups of eastern gray whales in the eastern Pacific start a two - to three - month, 8,000 — 11,000 km (5,000 — 6,800 mi)
trip south.