I forget a lot more than this. Remember what this is? I wonder how many kids know what it is. Even I have better electrical skills than this, especially the upper right plugs!
How SOS Became the Universal Distress Signal
-
The telegraph and Morse code were developed in the 1840s, but the system
was no use for ships at sea because it required wires. But then Marconi
gave u...
9 hours ago