Spotted this message on a bus window. I guess the person who wrote it wants his/her windows to be tagged with messages written in Magic Marker™.
Unless You Are A Masochist, Of Course
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worth a read
Mars For The Rest of Us — a weekly-or-more deep dive on the technical side of Mars exploration: rocket propulsion, microbiology, mission architecture, and everything in between. Written by Maciej Ceglowski.
Read it on Substack →