Giant reptiles could have escaped
demise had asteroid that slammed into earth reached planet moments earlier
or later, argues BBC documentary
Friday 19 May 2017 07:40 BST
Documentary suggests dinosaurs
could have survived fatal asteroid's impact blast had it landed in deep sea
Canadian Museum of Nature
From our standpoint 66 million
years later, it's easy to assume the demise of the dinosaurs was an
inevitability.
But an international team of
researchers is making a radical argument for why that may not be the case: Had
the asteroid that likely wiped out the dinosaurs slammed into the planet a few
minutes earlier or later, the scientists say, the fabled reptiles could still
be walking the earth now.
That conclusion makes up one of
the most intriguing revelations in The Day the Dinosaurs Died, a BBC Two
documentary that was filmed across three continents during the past year before
airing this week.
How is it possible dinosaurs
could still be alive?
If the massive asteroid that
smashed into present-day Yucatan hit the Atlantic Ocean or somewhere else, the
scientists maintain, the rock would have avoided an area made up primarily of
limestone and evaporated ocean sediments and rich in carbon dioxide, sulphur
and deadly gypsum. Due to the earth's rotation, even a minute or two could have
significantly changed the outcome of the impact.
It was, for all intents and
purposes, a kill shot for the giant reptiles roaming the planet.
“When the asteroid hits with the
force of something like 10 billion Hiroshima explosions, all of that gets
pumped up in the atmosphere, and it may have been really critical for the mass
extinction that followed as it blocked out the sun,” Sean Gulick, a University
of Texas professor who studies catastrophism in the geologic record, told The
Washington Post. “A few minutes earlier or later and the asteroid would've hit
the Atlantic or the Pacific Ocean and not slammed into a big, volatile platform
that was then vaporised as it spread upward and out.”
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