Interesting: I went to look up exactly what a sound post does, and it’s not so much transmitting vibrations between the top and bottom plates as it is providing a fulcrum so that the bridge can transmit the sideways vibrations of the strings (constrained by the bow pressing on them) to vertical vibrations in the body. Plucked instruments like guitars don’t need that because the strings can vibrate in all directions
Fascinating to look at yesterday’s California power demand vs. forecast graph & how effective the 3pm Flex Alert was at getting people to reduce power usage during peak hours. (That forecast demand peak was very close to the forecast supply peak.)
An amazing composite photo of the Milky Way and Jupiter over the snow-covered Himalayas, via @apod. Photographer Tomas Havel took 8 exposures from the same spot over 3 hours and combined them to make this image.