Sinister Barrier by Eric Frank Russell:
Science Fiction Inventions, Technology and Ideas

Scientists die mysteriously; pale blue spherical creatures feed on energy of human emotions. Who will triumph?

Famously, Russell derived his idea from writings by Charles Fort:

But perhaps my greatest debt is to two friends, one of whom asked me, “Since everybody wants peace, why don’t we get it ?” while the other posed me this one, “If there are extra-terrestrial races further advanced than ourselves, why haven’t they visited us already?” Charles Fort gave me what may well be the answer. He said, “1 think we’re property.”


Select an invention:

Identification Ring
An apparently ordinary ring, which minutely describes and identifies its wearer.

Stereoscopic Vernier and Cube
A means of photographing in depth.

Transparent Car Roof
You can see through the roof of the car.

 

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