| 31. | Global warming as a cause of mass extinction is supported by several recent studies.
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| 32. | The last mass extinction was caused by a meteor collision 66 million years ago.
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| 33. | Raup did find that every 26 million years, there will be a mass extinction.
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| 34. | Through a collaborative aproach between ecologists and nutritionists Environmental Nutrition promotes mass extinction event.
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| 35. | Mass extinctions have occurred before, and so has global warming.
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| 36. | The mass extinction is considered a result of human activity.
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| 37. | It is also the only known mass extinction of plants.
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| 38. | The latter proposed that a massive tsunami hit the globe, leading to mass extinction.
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| 39. | What's undesirable about this scenario, of course, is mass extinctions.
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| 40. | The ichthyosaurs had already disappeared before the mass extinction occurred.
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