A big bang

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A big bang

• 65 million years ago
  • An asteroid struck the Earth
  • Change forever
• Less than a minute after the impact
  • Molten rock
    • burst into sky
      • cooled out into space
        • became solid again
• In a matter of minutes
  • Burning rock fell to the surface
    • sparking forest fires
      • heating surface
        • cloudy areas→live were spared
        • under clear skies→burned alive
• Few days or months
  • dust from the impact circulated
    • the Earth in darkness
      • destroyed food chains
• Many years later
  • crystallined sulphur block out 80% of the sunlight
    • lack of photosynthesis
      • animals plants →began to die out
• In the end
  • 80% species disappeared (including the dinosaurs)
    • some land species
      • opportunity for human evolution