An analog signal carries information by copying an original sound
When we speak through the microphone, it turns our sound into some sort of electronic wave.
This electronic wave is caught by a recording device and later could be replicated into Mp3 file that we usually listen to
Because glass is not a good heat conductor. What it means is that heat isn't transfered through its structure as quickly as it would with metal, for instance. Because heat can't penetrate glass as quickly, the contents stay at the same temperature for longer.
David doesn't need to do anything at all. His explanation has already
been verified. He saw lights in the sky. He doesn't know what they are.
Therefore, by definition, they are UFOs ... Unidentified Flying Objects.
Period. End of discussion.
Huge numbers of unidentified things have been observed flying over
Roswell during the past many years. Also over Toronto, Toledo, Tulsa,
and Texarkana. In every single case, somebody didn't know what they
were. Isn't that a mysterious "coincidence" ? Oooweeooo ...
Well I'm not buying it. Put that together with all the blood moons lately, and
it becomes obvious that the end times are near. Somebody somewhere knows
more than they're letting on, and all of them are hiding the truth from us.
The answer to this question is microbiology