3 ms·

No, just over time.

• deleted 3y ago
  [deleted]
• Jensson 3y ago
  They tracked the balls for two months, if it was easy to see that they always move X direction during a sunny day they would know. That is likely the first thing they checked, we know that plants can turn to face the sun.
  • prvc 3y ago
    Because the terrain is never perfectly uniform, the pattern might not be evident within a small period of time, like one day.