If you are talking about the trail from Cape Town to Vladivostok, that one is not a straight line.
In passing, https://en.wikipedia.org/wiki/Paul_Salopek is walking from Ethiopia to Tierra del Fuego, tracing the path of human migration out of Africa. Walking the coast, not a straight line.
They aren't, as clicking through on a sibling's link demonstrates. Moreover, Senegal is nowhere near Cape Town.
In passing, https://en.wikipedia.org/wiki/Paul_Salopek is walking from Ethiopia to Tierra del Fuego, tracing the path of human migration out of Africa. Walking the coast, not a straight line.