[2020-3030]

Thanks for mentioning your site and have you seen http://scaleofuniverse.com/ ? I sometimes use that site as a lecture tool when a larger context of time and space is useful.

[mncharity]

Interesting mix. In addition to videos, there are interactives like https://learn.genetics.utah.edu/content/cells/scale/ and https://www.nikon.com/about/sp/universcale/scale.htm .