by: adam barr. once upon a time... long long ago
TRANSCRIPT
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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.
Let’s 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 couldn’t survive and without plant eaters, meat eaters would have nothing to eat either.
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Humans Too?!
• Mass extinction isn’t 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 . . . Don’t 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 . . . Don’t 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 can’t fix it, we can at least appreciate what we have before it is gone. That is awesome in itself.
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Love.