Cacti are famous for growing slowly, but scientists have discovered that these desert plants are actually evolving at an impressive pace. New research shows that cacti are remarkably quick at forming entirely new species, revealing that deserts are far more dynamic than they may seem. For decades, biologists believed that pollinators and highly specialized flowers were the main forces behind the development of new plant species. However, researchers at the University of Reading found that cacti follow a different pattern. Instead of flower size or pollinator type driving diversification, the key factor appears to be how rapidly cactus flowers change shape over time. Rapid Flower Evolution in Cacti The research team analyzed flower length data from more than 750 cactus species. Flower sizes varied dramatically, ranging from tiny blooms measuring just 2mm to giant flowers reaching 37cm, representing a 185-fold difference in size.…