Dinosaurs and Their Existence - Welcome to the Era of the Unknown

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Dinosaurs and Their Existence - Welcome to the
Era of the Unknowns
No one alive on this earth has first-hand
experience with Dinosaurs whatever may be the
creed, categories or type.
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Still, archaeologists and scientists firmly
believe that they existed on the basis of their
own theories and fossil findings. Dinosaurs were
discovered back in 1842 and are broadly
categorised as avian and non-avian dinosaurs.
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The Mystery - How Do We Know That Dinosaurs Even
Existed?
These diversified groups of reptiles are said to
have appeared between 243 and 233.23 million
years ago.
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Evidence of dinosaurs' existence was initially
found in England in the late 17th century. More
in-depth knowledge about dinosaurs has been
derived from a variety of fossil and non-fossil
records. The recorded shreds of evidence include
fossilized bones, faeces, gastroliths, feathers,
skin impressions, trackways, organs, soft tissues
and so on
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Their Origins and Evolution
Long before fossils were discovered, scientists
believed that dinosaurs were the ancestors of
birds. Palaeontologists consider Archaeopteryx to
be the first fossil discovery that revealed a
possible link between dinosaurs and modern birds.
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Dinosaurs originated during the Triassic era then
spread and evolved during the Jurassic and
Cretaceous periods. There are over 900 distinct
genera and over 1,100 distinct species of
non-avian dinosaurs.
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Some of the most popular ones are listed
below-Carnivores Tyrannosaurus Rex,
Velociraptor, Spinosaurus Herbivores
Apatosaurus, Diplodocus, Triceratops Omnivores
Deinocheirus, Coloradisaurus, Dromiceiomimus
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You can acquire a vague idea of their
above-mentioned species' anatomy by -

• Visiting a historical museum where you will learn
  more about them.
• Seeing the Jurassic Park movie series.
• And purchasing Life-Like Dinosaur toys from the
  market.

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Distinguishable Characteristics
Dinosaurs were dominant terrestrial inhabitants
of the Mesozoic Era. Their dominant features
include

• An intelligent creature with a strong body build.
  
• Variable sizes that range from small to big.
• All of them had an upright stance, with legs
  perpendicular to their body.

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• Many of them are fast-moving pack hunters.
• All these reptiles have an upright stance with
  legs perpendicular to their body.
• Dinosaurs had two holes behind their eye sockets.
• They have large, strong jaw muscles.
• They laid eggs.

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Who's to Blame for the Extinction of the
Dinosaurs?
Recent evidence in Sweden supports the theory
CretaceousPaleogene extinction event that took
place approximately 66 million years ago on earth.
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From then on, Dinosaurs got divided into two
parts

• Avian dinosaurs or modern-day birds that have
  evolved themselves and are co-existing with us.
• The extinct non-avian dinosaurs that include
  everyone except birds.

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This mass extinction is said to have occurred via
two mechanisms that have played major roles

• An extraterrestrial asteroid or meteorite
  collided with earth.
• This resulted in a flood basalt or volcanic
  series of eruptions that covered large stretches
  of land and the oceanic floor with basalt lava.
• These explosions resulted in the release of toxic
  gases as well as abrupt climatic changes.

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