This November 2014 video is called How a Single Asteroid Wiped Dinosaurs Off This Planet.
From daily The Independent in Britain:
Dinosaur extinction mystery solved? Asteroid hit oil field causing smoke that filled Earth’s atmosphere
Temperatures would have plunged as soot blocked out the sun and the rain virtually stopped falling
Ian Johnston, Science Correspondent
21 minutes ago
The dinosaurs were wiped out 66 million years ago because a massive asteroid hit vast oil deposits in Mexico, sending thick black smoke into the atmosphere all over the world, according to a new study.
Soot blocked out the sun, causing the planet to cool significantly and experience devastating droughts.
The amount of sunlight would have fallen by up to 85 per cent, while the Earth would have cooled by as much as 16 degrees Celsius on land for about three years.
At the same time, rainfall would have fallen by up to 80 per cent causing extreme drought.
The six-mile-wide asteroid, which hit what is now the Yucatan Peninsula, created the third-largest crater on Earth, some 110 miles across.
It struck the Earth with the force of about a billion nuclear bombs of the size that destroyed the Japanese city of Hiroshima during World War Two.
Previously it was thought that the impact caused vapours of sulphuric acid in the sky, which reflected sunlight leading to global darkness, near-freezing conditions and widespread acid rain.
“Recent impact experiments and model calculations have demonstrated that condensed sulfuric acid aerosols cannot form and persist over long periods following asteroid impacts.”
It is estimated that just 12 per cent of life on land survived the chaos unleashed by the asteroid, but 90 per cent of freshwater species were able to ride out the sudden shock to the planet.