Watch these recommended TED-Ed Lessons
What causes body odor?
Most of us don’t need more than one whiff to identify that generally unpleasant, characteristic smell we call body odor. But it’s a surprisingly complex phenomenon, influenced by our genetic makeup, age, diet, and hygiene. So what is this odor, exactly? Where does it come from? And can we do anything about it? Mel Rosenberg dives into the stinky science of body odor.

How does your body process medicine?
Have you ever wondered what happens to a painkiller, like ibuprofen, after you swallow it? Medicine that slides down your throat can help treat a headache, a sore back, or a throbbing sprained ankle. But how does it get where it needs to go in the first place? Céline Valéry explains how your body processes medicine.

Additional references
Nosebleed: causes, symptoms and diagnosis - Healthline
Nosebleeds are common. They may be scary, but they rarely indicate a serious medical problem. Heathline explains.

9 causes of anterior & posterior nosebleeds - WebMD
If you’ve ever wiped your nose and seen blood, you’ve had a nosebleed. WebMD investigates the types of nosebleeds and causes.