Mathematics
Fractals: The Mathematics of Nature's Patterns
Quick fact
The human lung’s branching structure covers an area roughly the size of a tennis court, yet it fits inside our chests thanks to its fractal, self-similar design.
Why this is interesting
Have you ever noticed that the veins of a leaf look like tiny branches of a tree, and the branches of a tree look like the whole tree itself? Why do the same patterns keep repeating at different sizes all around us?