Remember the days when photosynthesis was just a long word for plants making food with sunlight?

Goodness this guy knows everything doesn't he

Oxidation Is Losing, Reduction Is Gaining. OIL RIG

6:00 Sal almost got into some deep philosophical stuff here

SOMEBODY GIVE THIS MAN A MEDAL

I'm amazed of how much knowledge he has and how generous he is to share it with us. Bless him!

I think the main reason why we concentrate more and in turn learn more with these tutorials is that obviously they're one on one ... no other students which introduce new questions ... no other distractions ... such as room lighting ... people moving in class and outside of class, but the main reason is due to us reading the teachers facial expressions ... reading facial expressions, I think, by personal experience, deviates our thinking a LOT.

The hypothesis is called the endosymbiont hypothesis if anyone wanted to look it up. It's super interesting.

I remember watching your videos in high school to pass my biology tests. Now I'm here, after graduating college and working in biotech, still learning. Thank you!

it took my teacher 2 weeks to teach what this guy taught in 20 mins...

Someone get this man a Nobel's price or something

hey dude why do you know almost of everything

Feeling nostalgic listening to his voice

I love your videos. You do not talk to fast, you repeat yourself, and you use different colors. It helps me sooooo much! Thank you

i really appreciate the precise language Khan uses elucidating complex subjects!

This is the coolest science I've ever studied, it's really like an engine. Makes me think of some Victorian industrial engine.

Gosh, I totally get it now! Mr. Khan, something about YOUR way of explaining as absolutely enthralling and mesmerizing. You are meant to be a teacher!

Gosh i would love to be a teacher like him
A concept so tricky , made crystal clear in 20 mins. Perfect :)

great video but u said photophosphorylation and spelt photophorylation