Geography
Paleomagnetic Stripes Reveal Seafloor Spreading Rates and Reversals
Quick fact
The stripes on the ocean floor are symmetric around mid-ocean ridges and record the history of Earth's magnetic field flips over millions of years, acting like a tape recorder of spreading.
Why this is interesting
You've probably seen a map of the ocean floors with weird striped patterns. Did you ever wonder why those stripes exist?