Trading Cards
1848
Doppler Effect Observed for Stars
Light Waves
In 1842, the Doppler effect was proposed by Christian Doppler. First confirmed for sound in 1845, then for light in 1848.
Post Medieval
Story
“A wise man proportions his belief to the evidence.”
- David Hume
- 1748
Belief
Your confidence in an idea, whether scientific or spiritual, should rise with support, not desire.
Post Medieval
Quote
The First Religions of Colonial America
Roger Williams proved the concept of modern American society by creating a multi-religion multicultural secular colony.
Post Medieval
Article
Is cause and effect certain?
Causation versus Correlation
With the motion of life, cause and effect feel certain. We see stable patterns. But Hume reminds you, correlation does not guarantee causation.
Post Medieval
FAQ