George O. Smith 2 hr 52 min read

A scrap of artificial phosphor, compounded from reactor isotopes, fluoresces as expected, but also, impossibly, vibrates ever so faintly whenever the electron beam strikes it.

George O. Smith's 1948 story spins an ingenious first-contact and hard-SF tale from a laboratory anomaly. Sharp, clever golden-age SF. Read it for a story where a curious quirk in a new material opens the door to something no one in the lab anticipated.

In its time

Published in 1948, during the 1940s, the golden age begins.

Reading it

2 hr 52 min read (a novel-length work, settle in).