An early precursor of what is now called "force field" may be found in 's 1912 , where the Last Redoubt, the fortress of the remnants of a far-future humanity, is kept safe by "The Air Clog" generated by the burning "Earth-Current".
Produktionen av syre sker genom fotosyntes.
The field purportedly works by using a combination of lasers, electricity and microwaves to rapidly heat up the air creating a field of ionised superheated air-plasma which disrupts, or at least attenuates, the shock wave.
As they are primarily used by Foundation Traders, most other inhabitants of the do not know about this technology.
Därutöver har flera namnbyten genomförts, för att markera ett departements förändrade fokus.
Diskussionen kring är ett exempel på detta.
While sometimes an explicit power on their own, forcefields have also been attributed to other fictional abilities.
Med tiden fylldes atmosfären av syret från fotosyntesen.