Research one of the theories:

Impact of Asteroid
What Would Happen if an Asteroid 10 Kilometers Across Hit the Earth?

Ask an Astrophysicist

Catastrophic Volcanic Eruption
Is the Super Volcano Ready to Blow?

Tv vs. Reality: 'Supervolcano'

Could the Supervolcano 'nightmare' Come True?

Rapid Global Climate Change
Rapid Climate Change

The Science of Global Warming and Climate Change


Back