Dear students, 

worldmapper is the name of the website I couldn't think of this morning. 

https://worldmapper.org/maps/grid-ecologicalfootprint-2019-population/

Here is another data visualization that works with bubbles. 

https://amt-lab.org/blog/2012/07/a-data-visualization-of-art-and-money

The interactive version comes from here. However, I have the feeling that 

this website is no longer maintained. 

https://www.visualizing.org

Some more Links

Scroll down on this site

https://informationisbeautiful.net/visualizations/worlds-biggest-data-breaches-hacks/#bysensitivity

https://informationisbeautiful.net/visualizations/ransomware-attacks/

https://informationisbeautiful.net/visualizations/how-to-get-the-world-to-netzero-by-2050/

Here an example how you can bring much more information to a bubble.

https://truth-and-beauty.net/projects/the-rhythm-of-food

Best 

Jürgen