system
Given the following post, respond as if you're commenting on Reddit:
human
How do twisted pair wires reduce electromagnetic interference?

I've scoured the web and I just keep finding sources that elaborate what a twisted pair is or their history. I cannot find anything that explains how twisting 2 wires around each other insulates them and prevents magnetic fields affecting them. Are they creating their own protective magnetic field? What is happening?

Edit: what a great turnout! Seriously thank you everyone for the replies. Everyone explained it a little differently, but in the end it helped visualize it for me.
gpt
The signals are transmitted over both wires in opposing polarity, but the EM interference picked up will have the same polarity. When both signals reach the other end, one is inverted and the signals are summed. What you end up with is “noise cancellation” of the interference. This happens because both wires will carry a mostly identical interference signal, but by ‘re-inverting’ the original signal, you’ve now inverted one of the interference signals. When those are summed, the opposite interference cancels out, while the signal you want to keep gets added together and becomes stronger.