Mass%20Extinction!!!

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By Adam Barr
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• Once upon a time . . .

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• Once upon a time . . .
• Long long ago . . .

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• Once upon a time . . .
• Long long ago . . .
• Right here. . .

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• ON EARTH!!!!

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• We suffered a major tragedy.
• (

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• There was much sadness, death and destruction.

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• The scariest part of it

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• The scariest part of it,
• is that it could happen again.

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• It could happen again.

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• It could happen again.
• It could happen again.

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• It could happen again.
• It could happen again.
• It could happen again.

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• And if it did happen again . . .

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Even the lolrus would be lost forever . . .
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And a world without lolrus is a world without
love.
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A moment of silence for the lolrus
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But enough about lolrus.
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But enough about lolrus.

• Lets examine some myths, facts and theories
  surrounding Mass Extinction.

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Permian Era

• This era stretched from 290 to 248 Million Years
  Ago
• Last period of the Paleozoic Era

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Permian Era

• This era stretched from 290 to 248 Million Years
  Ago
• (MILLION
  YEARS!!!!)
• Last period of the Paleozoic Era
• (The era just before the dinosaurs)

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Permian Era

• 95 of all ocean animals died
• 70 of all land animals died
• Many insects and plans also died out

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BUT WHAT CAUSED THE MASS EXTINCTION?!
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Reasons?

• Because we cannot travel back in time, it is very
  difficult to accurately know what really
  happened.

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Reasons?

• Possible reasons include
• Volcanic eruptions
• Asteroid impacts
• Changes in atmospheric conditions

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Volcanic Eruptions

• If there were enough volcanic eruptions, the sky
  could have been covered in a dark cloud,
  therefore limiting the sunlight reaching the
  surface and causing a chain reaction of plant and
  animal extinction up the food chain.

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Asteroid Impacts

• If a large enough asteroid impacted with Earth,
  the resulting force could be larger than an
  atomic bomb. The force could create tsunamis and
  earthquakes and release a dark cloud covering the
  Earth.

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Atmospheric Conditions

• With both the volcano and impact theories there
  is the potential for gases to be released into
  the atmosphere leading to a change in the oxygen
  levels and killing off animals.

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Cretaceous-Tertiary Era

• Also known as the K-T Extinction, the
  Cretaceous-Tertiary extinction is the famous one
  that killed off the dinosaurs about 65 million
  years ago

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Cretaceous-Tertiary Era

• Much like the Permian Era extinction, there is no
  exact way of knowing what caused the extinction
  to happen.

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Cretaceous-Tertiary Era

• A long-standing theory is that the atmosphere
  changed and slowly killed off the plants because
  of a lack of photosynthesis. Without plants,
  plant eaters couldnt survive and without plant
  eaters, meat eaters would have nothing to eat
  either.

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Humans Too?!

• Mass extinction isnt simply an idea from the
  past it is very possible to experience another
  episode of it again.

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Humans Too?!

• With the rising levels of greenhouse gases and
  melting ice caps, it is possible that we might
  face some of the same conditions that killed off
  the dinosaurs.

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Humans Too?!

• In addition to the factors that lead to the
  previous mass extinctions, we also have hazards
  that are being created by humans.

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Preventable Causes

• Atomic bombs
• Pollution
• New viruses
• Unknown impacts of genetically modified foods
• Rain forest clear cutting

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BUT . . . Dont be sad!

• This is why it is amazing to be who we are.
  Unlike the dinosaurs or other animals that are
  extinct now, we have a chance to correct some of
  our potential problems.

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BUT . . . Dont be sad!

• This is why it is amazing to be who we are.
  Unlike the dinosaurs or other animals that are
  extinct now, we have a chance to correct some of
  our potential problems.
• And even if we cant fix it, we can at least
  appreciate what we have before it is gone. That
  is awesome in itself.

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Love.