http://news.yahoo.com/asteroid-impact-killed-dinosaurs-evidence-191146621.html
After reading the article I have imagined a new scene for the Sol and what may have taken place.
However, further work suggested the Chicxulub impact occurred either 300,000 years before or 180,000 years after the end-Cretaceous mass extinction. As such, researchers have explored other possibilities, including other impact sites, such as the controversial Shiva crater in India, or even massive volcanic eruptions, such as those creating the Deccan Flats in India.
Timing of an impact
New findings using high-precision radiometric dating analysis of debris kicked up by the impact now suggest the K-T event and the Chicxulub collision happened no more than 33,000 years apart. In radiometric dating, scientists estimate the ages of samples based on the relative proportions of specific radioactive materials within them.
Basically during this time there were alot of asteroids flying about the Sol System.
This could mean that such an event that caused the extinction of the dinosaurs on Earth could also have caused the extinction of life on Mars.
Since Mars is closer to the asteroid belt than Earth is the probability of an extinction sized asteroid impacting Mars is very likely.
This would also mean that during this time there are one of two possibilities that occured that caused an extinction on Mars.
1. The final chapter in the evolution of the Sol System was occuring where stray stellar mass from the Big Bang impacted a tenth planet between Mars and Jupiter obliterating it that caused debris to impact Mars and later on Earth. The tenth planets debris would then have been governed into an orbit around the Sun because of the gravity of the Sun. If the tenth planet would have been a child of Jupiter then its debris would have formed around Jupiter and not around the Sun. This would suggest that a tenth planet was in fact present and orbiting the Sun.
2. A squadron of various sized comets came screaming through our Solar System and collided with Mars first and then Earth or caused other objects to collide with Mars first and then Earth.
We know that comets contain frozen water. What would be really interesting to discover is how much water was on the planet during the time of the dinosaurs and before compared to the amount of water present on Earth after their extinction.
If it is discovered that less water was present on Earth during the dinosaurs extinction and before their extinction then we can assume that Earth was not impacted by asteroids but was in fact impacted by water bearing comets that added to the total volume of water present on Earth.
It could be safe to assume that Mars was impacted by a metallic asteroid that as it burnt up in the atmosphere its chunks would cause further devastation to the planet compared to a comet that when it burns up in the atmosphere would produce water vapors that would settle into the Earths surface instead of burning the surface to a cinder.
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