I wrecked my bike almost a decade ago. Not the first time, but the most violent wreck I've ever experienced.

Got thrown into traffic, broke some ribs, messed up my shoulder, and cracked my helmet almost in two.

After healing tried riding my bike again. Absolutely did not expect PTSD, but could not otherwise explain how wholly unconfident I felt while trying to ride a bike, even til this day.

"Science unable to explain how a bike in motion stays upright"

/s But once watched a video with a similar title that demonstrated not a single effect (caster, gyroscopic, etc.) is solely responsible for bikes staying upright and you can design bikes without each effect and they still work in principle.

So just slightly less complicated than rockets.

The physiological and mental effects of bicycles are a whole other blog post / thesis!

Yeah I agree. First one I read and still my favourite is the mechanical watch breakdown article. The explanations aren't too heavy and the demonstrations/interactions are so clean. Bartosz's site just has really nice design all over.

Heck, I'm over 30 and I still feel that sense of freedom when I bike. Keeps me riding!

Hills are fun. Through nothing more than your own manual effort you’re able to swiftly scale mountains and are rewarded with stunning vistas (and a fun decent).

hmmm. Well, whatever distances or gradient you're used to traveling by foot, a bicycle is quite effortless in comparison.

Good gearing takes care of most hills, and new electric bikes handle tougher hills than that, or get you where you're going without getting sweaty, but a regular bike will usually suffice.