Size of Life
Size of Life is a beautifully designed and illustrated size comparison by Neal Agarwal and Julius Csotonyi.

It starts with DNA and ends with Pando Clone - a single organism in Utah made up of 47,000 stems connected by a massive root system.
Side note: Internet Artifacts on neal.fun is also pretty interesting. I didn't know Amazon named a building on their corporate campus after the guy who made the very first order on their website.
Found via Kottke