Rose petals' unique shapes come from stress during growth. Differential growth and mechanical stresses create curled edges. Research shows petals violate a mathematical condition, causing stress.

JERUSALEM — Ever notice how rose petals curl at the edges with those elegant pointed tips? For centuries, artists have celebrated these distinctive shapes in paintings and poetry, but the science ...

Rose petals, celebrated for their vivid colours and graceful curves, are more than just visually striking. Their unique shapes arise from a complex interaction of biology, physics, and geometry. As ...