The cosmic distance ladder

This is one of the most fun and awesome YouTubes I have seen lately! I am a microbiologist and have always laughed about how when humans developed glass and grinding and ultimately lenses how some of us looked inward at tiny tiny things, while others looked outward at the stars. But they both derived initially from the ability to see things through that brand new technology of lenses.
Scientists have progressed far beyond the initial glass or water lenses; scanning tunneling electron microscopes to the amazing satellite instruments studying the stars.
So much of this depended on passionate, honest, probity people

And to paraphrase casual geographic

Drink water, hug someone, and know that I love you all!
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