Human Evolved After an Asteroid Killed Dinosaurs.

It was the time of the giants when dinosaurs walked the earth from a period between 250 million years ago to 66 million years ago. But one day around 66 million years ago, a 6 mile wide seared through the sky at nearly 14 km/s and slammed  into the Earth's crust. The explosion was roughly seven billion times as powerful as the Hiroshima bomb. That explosion sent shock waves across the landscape. 

Tsunamis between 100 and 300m high surged across the Gulf of Mexico. Magnitude-10 earthquakes destroyed the coastline, smashed all the forests. It was like 10 km wide bullet hitting the earth with 40 times the speed of soundcreating incredible explosion, incredible earthquakes, incredible tsunamis, and then anywhere within several hundred kilometres of the site you have building-size blocks raining down on the landscape.

Following this, the debris in atmosphere covered the

entire planet. Many of the forests were burned. Near

to the impact site many of the animals/ plants died

either of the scorching temperatures, the ripping winds,
the earthquakes, the tsunamis or the boulders that
rained from the sky. Animals in other parts of planet

died because of lack of sunlight.

With all the vegetation gone, the herbivores have nothing to eat. If the herbivores die then the carnivores have nothing to eat. Life almost went extinct except few flying dinosaurs and some small rats like mammals which eventually adapted to the changing environment over millions of years and finally 7 million years ago, human species started to evolve and we are here today.

Life was wiped out paving the way to the fittest animals and plants to survive. There is no greater force than evolution.