In a time when time travel exists, various extinct native Eurasian animals had been intentionally reintroduced to throughout their former Pleistocene ranges in Eurasia (climate preferences depend on

Title: Revival of Pleistocene The year is 1945. Time travel was being significantly explored by a group of intrepid scientists, who, through a discovery much earlier, realized they could use this newfound technology not just to observe but also to intervene in history. A consortium of world-class scientists had established the Pleistocene Rejuvenation Initiative, dedicated to reintroducing extinct native Eurasian animals throughout their former Pleistocene ranges in Eurasia. Their pilot venture had been the retired reintroduction of the woolly rhinoceros (Coelodonta antiquitatis) into the frigid expanses of northern Europe and Siberia. Using time travel, they located and extracted viable genetic samples, bypassing any challenge of finding pure, uncontaminated DNA in well-preserved specimens that were tens of thousands of years old. A population of woolly rhinoceroses was bred and raised in conditions mimicking their natural Pleistocene environment before they were released back into the wild. Quick to follow were projects for the Siberian unicorn (Elasmotherium sibiricum), the narrow-nosed rhinoceros (Stephanorhinus hemitoechus), and the Merck's/forest rhinoceros (Stephanorhinus kirchbergensis). Each was replanted into their ancestral homes, creating a resurgence of ancient life across the Eurasian continent. Simultaneously, the giant deer (Megaloceros giganteus) was reintroduced to the ancient forests stretching from Ireland to Siberia. Alike, efforts were in motion to return the straight-tusked elephant (Palaeoloxodon antiquus), the woolly mammoth (Mammuthus primigenius), the dirk-toothed cat (Homotherium latidens), and the cave lion (Panthera spelaea) to wildernesses they once roamed. By the mid-20th century, the vast Siberian plains were again studded with the imposing silhouettes of woolly rhinos and mammoths; ancient forests echoed with the roars of dirk-toothed cats and cave lions; and valleys were graced with the majestic appearance of giant deer. Each species had successfully established native breeding populations. They were returned to their native habitats, bolstering ecosystem health and biodiversity considerably. Despite skeptics fearing massive disruption of existing ecosystems, systematic introduction and prudent management ensured that the returning species fit well into the present ecosystems. Instead of a disaster, the Pleistocene Rejuvenation Initiative to facilitate the expansion of these creatures throughout their former ranges became an epic tale of ecological triumph. Surprisingly, the time paradox, often theorized, did not occur. The scientists posited that their time-era was the future for these animals, not their past, and thus they were not altering their history but rather changing their own present. A loophole in the time paradox was thus exploited, allowing for historical nature, literally, to take its course yet again on the breathtaking landscapes of Eurasia. As these once-extinct animals thrived, they reshaped the lands they lived on, presenting Europe and Asia with an undeniable awe, as if a page from a prehistoric narrative had been reopened, casting its beautiful shadow into the fabric of the present.