3 Days, 9 Months, 27 Years (The Time Traveler's Passport)

by John Scalzi

The theoretical process is almost never what actually happens. Theory is almost never practice.

It is psychologically important, when traveling through time, to have another human be the last and first thing you see.

because humans can’t not stick their fingers into wall sockets (this is a personal observation, not an organizational conclusion).

A scientist, however, knows that initial conditions are everything, and that small differences at the outset make for huge differences in results down the line. The observer and the observed always interact. Everything changes.