As the 19th century came to a close, physicists were feeling pretty satisfied with the state of their science. The great edifice of physical theory seemed complete. A few minor experiments remained to ...

In the late 1800s, no one knew what light was. Everyone knew it behaved like a wave some of the time, but all waves need to travel through some propagation medium. This propagation medium was called ...

Brendan Foster describes renewed interest in the luminiferous aether (2 November, p 32). For all its shortcomings, the aether was one of the most productive scientific ideas of all time. Many ...