
"For over 100 million years, dinosaurs, and not mammals, were the dominant form of life on Earth. The pinnacle of evolution at the time, dinosaurs filled the niches of being the largest, most differentiated animals -- herbivores and carnivores both -- on the planet. As you well know from seeing their fossils, they would dwarf their modern, mammalian counterparts if they were still alive today. But they're not still alive today, because a mass extinction event occurred 65 million years ago. And the fossil record indicates that it occurred all at once, which is unusual. The Earth was overrun with dinosaurs, everywhere. In just a few hundred thousand years, they were all gone. All of them. Large, small, it doesn't matter. That's what extinct means -- every last one." Ethan Siegel
There are some evidence that the cause might not from Chicxulub asteroid impact so now scientist try to look for more evidence, so... what kind of event that actually happen that erase all those Dinosaurs? a very interesting mystery.

