SOLAR SYSTEM

Detailed explanation-1: -Dinosaurs may have already been in decline on Earth some 65 million years ago, but a team of NASA scientists now believes it was the sulfur-rich atmosphere created in the aftermath of an immense asteroid collision with Earth that brought about a global freeze and the demise of these giant Mesozoic creatures.

Detailed explanation-2: -The Cretaceous mass extinction event occurred 66 million years ago, killing 78% of all species, including the remaining non-avian dinosaurs. This was most likely caused by an asteroid hitting the Earth in what is now Mexico, potentially compounded by ongoing flood volcanism in what is now India.

Detailed explanation-3: -End Cretaceous (65 mya) – the event that killed off the dinosaurs.

Detailed explanation-4: -The cause of this extinction? It’s thought that the main catalyst was the movement of the supercontinent Gondwana into Earth’s southern hemisphere, which caused sea levels to rise and fall repeatedly over a period of millions of years, eliminating habitats and species.

Detailed explanation-5: -Abundant fossil bones, teeth, trackways, and other hard evidence have revealed that Earth was the domain of the dinosaurs for at least 230 million years. But so far, not a single trace of dinosaur remains has been found in rocks younger than about 66 million years.