How plants tell time Dasha Savage

View full lesson: Morning glories unfurl their petals like clockwork in the early morning. A closing white waterlily signals that its late afternoon. And moon flowers, as their name suggests, only bloom under the night sky. What gives plants this innate sense of time Dasha Savage investigates how circadian rhythms act as an internal timekeeper for flora and fauna alike. Lesson by Dasha Savage, animation by Avi Ofer.