Thank you! The first thing I did when coming to this thread was search for posts containing "Robert Forward", as any discussion of negative inertial mass is in

Thank you! The first thing I did when coming to this thread was search for posts containing "Robert Forward", as any discussion of negative inertial mass is incomplete without mentioning his work. So, kudos. Anyone interested in the implications of negative mass should probably check out Timemaster, a sci-fi novel by Forward. Negative mass can hypothetically do some interesting things. Things such as allowing lightspeed travel by matching negative mass to positive mass in equal amounts, leaving a non-photon object with rest mass = 0, or producing energy by accelerating negative mass to high velocities. Unfortunately, Forward is much better as an idea guy than he is as an author. The scene where the hero travels back in time and has a threesome with himself and his wife is a bit awkward...