Most flowering plants are more than willing to spread their pollen around. But some flowers hold out for just the right partner. Bumblebees and other buzz pollinators know just how to handle these stubborn flowers. They vibrate the blooms, shaking them until they give up the nutritious pollen.
Animals dance, sing, flirt, and compete with everything they've got to find and secure a mate. For many, the all-important bonds they share as a couple are what enable the next generation to survive. These are love stories as various and intriguing as the lovers themselves.
Pi is commonly recognized as a number that relates a circle's circumference to its diameter, but it also appears in many other phenomena. Is math invented by humans, or is it the language of the universe? Discover math’s signature in the swirl of a nautilus shell, the whirlpool of a galaxy, and the spiral in the center of a sunflower.