4 ms·
> It seems to be a peculiarity of our human nature that if we are watching the movement of a stick's shadow, that we face north to do so. No, it just logic. If
by tomp 12y ago
> It seems to be a peculiarity of our human nature that if we are watching the movement of a stick's shadow, that we face north to do so.
No, it just logic. If you're standing south of the stick (facing north), the stick's shadow will move in (roughly) a half-circle throughout the day, starting at the left of the stick, moving right and up (while contracting) to vertical (pointing north), and then extending further to the right until it reaches (almost) east. It will be shorter in the summer and longer in the winter. You could also watch this "from above" (north of the stick, facing south), but if you're south of the stick, looking at the movement of the shadow in the half circle is quite similar to looking at the movement of the sun in the sky (except in the opposite direction).
Most things are reversed if you're in the southern hemisphere.
- ajarmst 12y agoExactly. When I saw the title of the post, my immediate thought was that the answer was simple: "because sundials were invented in the Northern Hemisphere." (Or at least they spread primarily from and in the north).