The re-establishment of these extinct native Australian and New Guinean animals in their respective native prehistoric ranges, and the subsequent successful re-establishment of native breeding popul

Scenario: Backdrop of the Mid-20th Century Australia and New Guinea As science and technology progressed significantly during the early 20th century, realistic possibilities of time travel began to appear on the horizon. A certain Dr. Hannah Kellerman, living in Melbourne, was a revolutionary pioneer in this field. Propelled by her passion for the extinct indigenous wildlife, she undertook an ambitious project - an initiative to reintroduce extinct Australian and New Guinean animals to their respective and recognized native prehistoric habitats. She named her project "Time Ark". Starting in the early 1930s, with the help of a carefully assembled team of scientists, Dr. Kellerman undertook numerous leaps in time back to the Pleistocene era. Their goal was collection and preservation of various extinct species in a ethical, scientifically sound manner. There was no disruption of the time-space continuum as the existence of time paradoxes was irrelevant. By the mid-1940s, the Time Ark was laden with a plethora of species such as the giant wombat (Diprotodon optatum), the horned wombat (Zygomaturus trilobus), the marsupial panda (Hulitherium tomasetti), the broad-nosed wombat (Palorchestes azael), the giant koala (Phascolarctos stirtoni), the giant short-faced kangaroo (Procoptodon goliah), the common short-faced kangaroo (Sthenurus stirlingi), the marsupial lion (Thylacoleo carnifex), and the thylacine (Thylacinus cynocephalus). Not forgetting the unique egg-laying mammals, Dr. Kellerman successfully gathered Hackett's giant echidna (Murrayglossus hacketti), the giant echidna (Megalibgwilia owenii), and the interesting bird species, the Newton's mihirung (Genyornis newtoni). Additionally, the Australian rainbow snake (Wonambi naracoortensis), was a successful and fascinating inclusion to the Time Ark. Upon returning, Dr. Kellerman introduced these creatures to their former Pleistocene territories across New Guinea and Australia. Understanding the distinct climate preferences of each species, the team ensured the survival, adaptation, and proliferation of these species. The formerly extinct wildlife began to flourish once again, successfully re-establishing native breeding populations. From the steamy rainforests of New Guinea to the arid heart of Australia, the continent was once again home to its original inhabitants. The Time Ark project served as an unprecedented scientific endeavor that restored ecosystems and rejuvenated the rich biodiversity of the region. Thus, during the mid-20th century, Australia and New Guinea turned into beautiful living museums, hosting creatures that once roamed these lands millennia ago. Today, thanks to the Time Ark, the outback resounds with the calls of the giant koala and the thump of the giant short-faced kangaroo while the scuffle of the broad-nosed wombat can be heard in New Guinea's forests, making the vision of Dr. Hannah Kellerman a reality and rewriting history in a way never before imagined.