Definitions and explanations of key terms used throughout the site.
A tentative explanation or proposition that can be tested through observation or experiment.
It is the supreme challenge, and a brutal one, but every scientific theory must be testable and compatible with reality. The nineteenth-century naturalist Thomas Huxley stated it thus: ‘The great tragedy of Science — the slaying of a beautiful hypothesis...
Source: Big Bang by Simon Singh
Think About the Place Where You Live
If you are confused, check with the sun. Carry a compass to help you along. Your feet are going to be on the ground. Your head is there to move you around.