Back to Extinction (Traditional Painting)

The dinosaurs had been roaming Earth since their release into the mainland in 2018, but it proved to be inhospitable to them due to its altered landscape, and they began dying off. However, some species survived in a few isolated, oxygen-rich tropical climates in equatorial regions, such as Ile Saint-Hubert as the climate near the equator is reminiscent of the Earth's climate 60 millions years ago.

By 2027, dinosaurs had started to die out globally due to changes in the environment, only surviving in regions closer to the equator. Parasaurolophus was amongst these species.

Larger dinosaurs would be quite comfortable with the climate of tropical and semi-tropical parts of the world. That is, until they all died of altitude sickness. 

While some non-avian dinosaurs might be able to survive in today's atmosphere, many larger species would likely struggle due to factors like oxygen levels, climate, and the availability of suitable food sources. Smaller dinosaurs, particularly those with bird-like respiratory systems, might have a better chance of adaptation. The atmosphere during the time of the dinosaurs had a slightly higher oxygen content than today, perhaps around 35% compared to the current 21%. However, some experts on say that dinosaurs had more efficient respiratory systems than many modern animals, potentially negating the impact of lower oxygen levels.  While large dinosaurs like sauropods might have had some difficulty, smaller species with more bird-like lungs, which are known to be highly efficient, could potentially adapt. 

Many modern ecosystems have evolved to support smaller animals than the massive dinosaurs of the past. Large herbivores would need vast amounts of vegetation, potentially disrupting current ecosystems. Smaller dinosaurs, particularly those that could adapt to consume a wider variety of food sources, might have a better chance of survival. 

Smaller dinosaurs, like those in the ornithomimid and maniraptoran groups, which are closely related to birds, would be the most likely to adapt to modern conditions. Some could potentially fill niches currently occupied by birds or mammals, like ostriches or emus. Smaller dinosaurs might also be able to adapt to urban environments, similar to how pigeons and rats have adapted. 

While some non-avian dinosaurs might survive in today's environment, it's likely that only smaller, more adaptable species would thrive. Larger species would face challenges with oxygen levels, climate, and food availability.