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Would you like to merge this question into it? MERGE already exists as an alternate of this question. Would you like to make it the primary and merge this question into it?
MERGE exists and is an alternate of. However some reported sightings have taken place in Africa. Scientists have many theories about what caused the extinction of dinosaurs. Below are thoughts on some of the most common theories: It could also have been the combination of the Chicxulub asteroid impact event causing worldwide fires and environmental catastrophe in association with the Deccan Traps volcanic event, which occurred at around the same time, or possibly as a result of, the asteroid impact event.
There are many theories that are written throughout history of why the dinosaurs exactly were driven into extinction. Most are meteor impact related. By looking at craters all over the world, scientists can estimate the meteors size, speed and its impacts effect on the local environment. See the related link for more information.
Though the large meteorite impact Chicxulub figures prominently in a lot of the theories of how the dinosaurs became extinct, the idea of a gamma ray burst has also come up now that we are aware of them and the threat they pose.
Additionally, there was an "outburst" of volcanic activity during this period. This extinction event is at the Cretaceous-Tertiary K-T boundary.
It should also be added that several other large impact events occurred right about the time of Chicxulub, including Silverpit and Boltysh craters, among others.
It seems the deck was "stacked against" the dinosaurs, regardless of how you look at it. It is possible that things are "found" to "corroborate" extinction by space rock, but the facts are pretty convincing, even for the skeptic. It was noted but is worth repeating: And the demise of the terrible lizards was caused by something dramatic given the relatively narrow window in which they disappeared.
The hypothesis that states an asteroid-impact was the sole cause of the extinction is just that - an hypothesis, not a fact. Most paleontologists feel that the asteroid impact was just one of a series of catastrophic events that ultimately wiped out the dinosaurs.
There is evidence of a huge meteor strike just off the Yucatan Peninsula, true.
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And a meteor may well have put a final period to the extinction pulse. But there is also evidence that other factors may have been involved. The pulse seems to have taken more than thousand years to complete which makes the asteroid theory implausible as a complete explanation.
There is evidence that there was massive volcanic activity also, and a drastic climatic change. Dinosaurs were already fast becoming endangered species before the Chicxulub impact.
Increased volcanic activity such as the Deccan Traps in modern day India was slowly killing many species. Between 68 to 60 million years agokm 2 of igneous rock was deposited in places more than 2 km thick.
The bulk of the eruptions occurred about 66 million years ago near modern day Mumbai. These eruptions lasted as little as 33, years but the effect on the environment would have been staggering.
Dust and debris thrown into the atmosphere along with sulphur dioxide would have cooled the earth. Also many poisonous gases would also have been released. Studies on modern day birds suggest that these poisonous gases not only directly killed dinosaurs but also caused thinning of the shells of their eggs which meant that many would fail to hatch.
It has also been suggested that disease killed off the dinosaurs. A very deadly and contagious disease may have circulated among the dinosaurs forcing them to become extinct. Still yet another theory is that the Earth just gradually changed in climate over a long time period and the dinosaurs were not able to adapt to the cooler, dryer climate.
What elements have led scientists to believe that a meteor caused the extinction of the dinosaurs? Did tsunamis cause the dinosaur extinction? Scientists believe that a giant meteor hit the Earth, killing all the dinosaurs and causing their extinction.
It is true that the extinction of dinosaurs is mostly due to the meteor that hit earth during the time but according to scientists, only around 60 percent of the organisms on earth died due to direct impact. Some other reasons the dinosaurs are extinct may have included climate change, competition, or volcanic eruptions.
And on the part about tsunamis, there actually was a massive tsunami near the Gulf of Mexico after the disturbance of the meteor that swept nearly miles inland.The ethics and consequences of this idea have been questioned but, de-extinction has the potential to be truly helpful to humans and the environment, and many of the scenarios that people think could happen, are actually impossible.
timberdesignmag.com dinosaurs could have starved to death or died from overeating. Or their extinction may have been caused by a nutritional problem, such as newly ‘evolved’ flowering plants not providing the proper nutritional balance.3/5(2).
Jul 05, · This paper proposes that a large impact event and volcanic eruptions caused large warming spikes: ”Antarctic ocean temperatures jumped about 14 degrees Fahrenheit during the first of the two warming events, likely the result of massive amounts of heat-trapping carbon dioxide gas released from India’s Deccan Traps volcanic region.
The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took . Scientists have many theories about what caused the extinction of dinosaurs. Below are thoughts on some of the most common theories.
Since about 90% of dinosaurs were her bivores (plant eaters. Dinosaurs were minutes away from surviving extinction, says new research Documentary suggests dinosaurs could have survived Though many scientists say the impact of an asteroid caused many.