If we consider a hypothetical scenario where time travel to the past is somehow possible, and you were to travel back to the time when the comet impact occurred 66 million years ago, there are several factors to consider regarding survival:
Immediate Impact: The impact of the comet would have caused a catastrophic event, including massive explosions, shockwaves, and intense heat. Being in close proximity to the impact site would be extremely dangerous, and it is unlikely that anyone would survive such an event regardless of the time period.
Environmental Changes: The comet impact led to a series of global environmental changes, including widespread fires, tsunamis, and an impact winter. The atmospheric dust and debris would have blocked sunlight, leading to a significant decrease in temperatures, which would have had a severe impact on ecosystems. The surviving organisms, including dinosaurs, faced extreme challenges in terms of food availability, climate, and overall survival.
Ecosystem Adaptation: The extinction event resulting from the comet impact had a profound effect on the Earth's ecosystems. Many species, including non-avian dinosaurs, went extinct, while others, such as birds and mammals, managed to survive and eventually thrive. Re-entering this altered ecosystem as a human would present numerous challenges, as it would be vastly different from the world we currently inhabit.
In summary, even if time travel were possible, surviving the cataclysmic event that wiped out non-avian dinosaurs 66 million years ago would be highly unlikely. The immediate impact, subsequent environmental changes, and the challenges of adapting to a drastically different ecosystem would make survival extremely challenging for any species, including humans.