Summary:
- The article explores the circadian rhythms of trees, specifically referencing studies that utilize laser scanning to observe physical "drooping" or movement of branches and leaves during nighttime hours.
- It explains the biological mechanism behind this phenomenon, noting that trees reduce internal water pressure (turgor pressure) at night, which causes them to relax their structures until sunrise.
- The content highlights that these movements are a deliberate physiological response to the lack of photosynthesis, effectively demonstrating that trees possess a form of biological "sleep" cycle similar to other living organisms.