Roam Research
fromTheregister
1 week agoMaker builds DIY RF monitor to aid shortwave listening
A DIY device measures ambient RF energy to help shortwave radio enthusiasts understand propagation conditions in the ionosphere.
We now recognize that even ideas like "when" and "where" are subject to the laws of Einstein's relativity, and that in relativity, space and time are not absolute quantities, but rather are relative to each and every unique observer.