White Blood Cell
Your immune system's front-line soldier
Medicine & Biology
Cells, pathogens, pills, and the tools of healing. Biology at every scale, from a single virus to the human body's daily miracles.
SARS-CoV-2 (COVID-19 Virus)
The 100-nanometer particle that shut down the world
Human Hair (Single Strand)
A cylinder of dead keratin you obsess over daily
Fingernail Growth (Per Day)
The slowest show on your body
Aspirin Tablet (Standard 325mg)
The wonder drug that is older than its own company
Syringe Needle (Standard 22-gauge)
A hollow tube thinner than a strand of spaghetti
Staphylococcus aureus
The golden grape-shaped germ on your skin right now
Blood Platelet
The body's tiny emergency repair crew
Human Heart
The tireless pump that never takes a day off
Mitochondrion
The powerhouse of the cell (yes, really)
Medical X-ray (Single Chest Exposure)
Seeing through you in a fraction of a second
Contact Lens
A transparent disc that corrects vision from 1 cm away