Earliest Known 3D Map Found in Prehistoric French Cavern, Say Experts
In the cramped confines of a small cavern to the south of Paris, scientists have 'read between the lines' on the floor and ...
Hackaday3d
Before GPS There Was LORAN
We found it nostalgic to watch [ve3iku] fire up an old Loran-A receiver and, as you can see in the video below, he got it working. If you aren’t familiar with LORAN, it was a common radio ...