Madison County Iowa is known for it’s covered bridges. In this video I walkthrough three of those bridges. You can read more about them on the following Wikipedia links:
Cost Savings of LED Bulb over 7 Years
Varied Carpet Beetle (Anthrenus verbasci) under USB Microscope
Varied Carpet Beetle (Anthrenus verbasci) under USB Microscope
USB Microscope Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZP6s_ZiMOzoJjrp5TsKu2R0
https://en.wikipedia.org/wiki/Varied_carpet_beetle
The USB microscope I used in the video is no longer available. It was a 60x-250x model. You can find similar models on Amazon.
USB Microscopes (Amazon Affiliate)
US: https://amzn.to/3iJcnxi
UK: https://amzn.to/3avgJVJ
CA: https://amzn.to/3asrqbI
ES: https://amzn.to/3g6nC1b
FR: https://amzn.to/2PW9Gw2
IT: https://amzn.to/340xJC5
DE: https://amzn.to/33YDBfa
IN: https://amzn.to/3105qlv
AU: https://amzn.to/2E845jC