Extinction of Dinosaurs


The beginning of the dinosaur life was during the Triassic period when all of the Earth’s continents were joined together into a vast landmass. Dinosaurs dominated the Earth for 160 million years until the Cretaceous–Tertiary extinction, which occurred approximately 65 million years ago.

The cause of the dinosaur extinction is still a mystery and has become a widely debated topic in the science community. There are numerous proposed theories for the extinction, for example:

An asteroid collision theory states that a large bolide or meteorite hit the Earth and its sudden impact increased the amount of iridium and dust levels in the atmosphere reducing surface sunlight and heat throughout the Earth. This meteorite collision caused a long and unnatural drop in the Earth’s atmospheric temperature. This impact then caused the extinction of all terrestrial life on Earth at that period.

The theory of massive volcanic activities states that these events would have released a massive amount of lava, volcanoic ash and dangerous carbon dioxide into the atmosphere, reducing surface sunlight, hindering photosynthesis, and severely disrupting the Earth’s biosphere. Therefore, no life could survive in this environment at that time.

Another hypothetical theory is that dinosaur eggs were consumed by other mammals causing the dinosaurs’ extinction in the late Cretaceous Age.