What Was Earth Like Before Dinosaurs Went Extinct?

Earth wasn’t always the world we know today. Before the dinosaurs went extinct, the planet was hotter, wetter, and teeming with giants roaming lush forests, flying across the skies, and hunting in the seas. Let’s explore a detailed view of what Earth was like before dinosaurs went extinct.

Climate

During the dinosaurs’ rule, our planet was nothing like it is today. In the late Cretaceous period, it was far warmer; there was no ice or snow in the North and South Poles. The higher temperatures were largely due to the higher levels of carbon dioxide (CO?) since the gas naturally trapped heat in the atmosphere.

Moreover, the frequency of volcanic activity increased CO?, water vapor, sulfur dioxide, and other greenhouse gases in our atmosphere. In addition to trapping heat, compounds like water vapor added moisture to the atmosphere, creating a humid environment.

The heat and humidity made the perfect environment for greenery, resulting in rainforests throughout the landscape.

Shifting Geography

Another fascinating thing to know about Earth before dinosaurs went extinct is that its geography was shifting. During the late Cretaceous period, the Age of Dinosaurs, the continents were slowly drifting apart. More specifically, the landmasses that made up Pangea were moving toward their current positions. This resulted in natural valleys and waterways between ecosystems, which further diversified the land.

The tectonic movement also caused volcanic activity by stretching and cracking Earth’s crust. This allowed magma to rise and erupt, further shaping the continents as they formed and creating other landmasses.

Life in the Skies, Land, and Seas

When we think about the Mesozoic era, dinosaurs are the first creatures that come to mind, but they were by no means alone; creatures also lived in the sky and ocean. We’ve broken things down to give you an idea of some of the many animals living on our planet during that time.

Life on land:

• T. rex
• Triceratops
• Ankylosaurus
• Hadrosaurus

Life in the skies:

• Quetzalcoatlus
• Pteranodon
• Ichthyornis
• Confuciusornis

Life in the sea:

• Mosasaurus
• Plesiosaurus
• Ammonites
• Xiphactinus

While all these animals lived at or around the same time, they were not all dinosaurs. The word “dinosaur” strictly refers to land-dwelling reptiles.

Mesozoic Fact

Flourishing plant life and mammals also existed alongside these fierce reptiles; most mammals were relatively small, especially compared to today’s standards.

Why Did It End?

The end of the Mesozoic era is less about why and more about how, since the mass extinction event was a natural result. About 66 million years ago, a massive asteroid hit Earth in what is now the Yucatán Peninsula, unleashing fire, shockwaves, and a cloud of debris that blocked sunlight. There were also enormous volcanic eruptions at this time, which further heated the atmosphere, killing animal and plant life.

Dino Fact

Plants dying had a massive impact on all species, as it killed the herbivores’ food source, which in turn affected the carnivores; this led to the collapse of the food chain.

Get Dinosaur Figures

The dinosaurs may have vanished from Earth, but their incredible world doesn’t have to stay in the past. Creative Beast Studio’s Beasts of the Mesozoic Ceratopsian series includes various species from this group. Keep your favorite dinosaurs’ legacy alive in your home!