1squared search - A darkened chamber, or a large piece of card to shield your screen from stray light.

Login or Signup

So you survived an apocalypse...

How to rebuild a civilization from square one. Find out more.

1 Result

How to Observe the Sun's Face Safely by Projection Galileo Galilei

For too long, we have been told the heavens are perfect and unchanging. This is a falsehood! The Sun itself, that glorious lamp, has...

How to Observe the Sun's Face Safely by Projection Galileo Galilei

For too long, we have been told the heavens are perfect and unchanging. This is a falsehood! The Sun itself, that glorious lamp, has...