Early radio receivers worked on a principle called Tuned Radio frequency (TRF), patented in 1916. They weren’t very easy to use, requiring each stage to be tuned to the same frequency (until ...

President Donald Trump seeks an “immediate expansion” from federal forests, testing the economic and environmental costs of ...

Saying that Bob Dylan is the father of folk music is probably overstepping a bit. However, saying that the vocalist is one of the most prominent writers of anti-war and protest songs in the 20th ...