আইজাক আসিমভের রচিত প্রথম উপন্যাসের নাম কী ?
Early on during Asimov's original world-building of the "Foundation" universe, he established within the first published stories a chronology placing the tales about 50,000 years into the future from the time they were written ("circa" 1940). This precept was maintained in the pages of his first novel "Pebble in the Sky", wherein Imperial archaeologist Bel Arvardan refers to ancient human strata discovered in the Sirius sector dating back "some 50,000 years". However, when Asimov decided decades later to retroactively integrate the universe of his "Foundation" and "Galactic Empire" novels with that of his "Robot" stories, a number of changes and minor discrepancies surfaced – the character R. Daneel Olivaw was established as having existed for some 20,000 years, with the original "Robot" novels featuring the character occurring not more than a couple of millennia after the early-21st century Susan Calvin short stories. Also, in "Foundation's Edge", mankind was referred to as having possessed interstellar space travel for only 22,000 years, a far cry from the 50 millennia of earlier works.
Pebble in the Sky