What is a houseplant made of?
This is the eleventh official lesson of our 180-lesson Big Course. Along the way to the answer, you'll learn about how much your food weighs, how much you SHOULD weigh, a new kind of atom, and something... shocking, to say the least.
This is a free preview.
What's in your chest?
This is the twelfth official lesson of our 180-lesson Big Course. Along the way to the answer, you'll learn what your lungs actually are, what your ribs really are, and what your heart really is.
...yeah, it's one of those kinds of lessons! ;)
Why don't you have gills?
This is the lucky thirteenth official lesson of our 180-lesson Big Course. Along the way to the answer, you'll learn something you SHOULDN'T do to a goldfish, a few odd tweaks to a reasonable-sounding sentence, how an amoeba breathes, how an axolotl breathes, and what's in your blood.
Then you'll see how it all fits together, and you'll laugh, and laugh, and laugh...
Who had the first lung?
This is the fourteenth official lesson of our 180-lesson Big Course. Along the way to the answer, you'll learn how your family tree REALLY looks, what the first lung might have been useful for, and (for some reason) how many kinds of fish there are.
Where did my stamp go?
(I, um, lost it. Up my nose. And it went... fairly far.)
This is the fifteenth official lesson of our 180-lesson Big Course. Along the way to the answer, you'll meet your lungs' three bouncers: a gross one, a VERY gross one, and a HOW DO WE EVEN PRETEND THIS IS FAMILY FRIENDLY one.
Aaaaand you'll draw a map of your whole respiratory system. So that's good.
It's a secret. Get a peek here!
