Ornithologist Richard Prum shares his knowledge of the natural math of feather patterning. Simple feather patterns can be predicted using mathematical models called Turing reaction-diffusion equations. As a feather grows, each new cell must decide whether it will receive pigment or not, depending on overlapping chemical gradients and the pigmentation of neighboring cells. Richard Prum is the William Robertson Coe Professor of ornithology, and head curator of vertebrate zoology at the Peabody Museum of Natural History at Yale University.
Over a billion years ago, tiny jewel-like cyanobacteria oxygenated earth's atmosphere. These single-cell organisms are the reason we have air to breathe. Cyanobacteria are also believed to be the precursors responsible for photosynthesis and multicellularity as a whole. Cyanobacteria are found in...
Cyanobacteria oxygenated Earth's atmosphere billions of years ago, allowing oxygen-using creatures to evolve. Cyanobacteria are also credited with devising photosynthesis and multicellularity. Today they provide 20% of Earth's oxygen. These photosynthesizing bacteria are found in many environment...
Recording the anthill in its splendor of minute sprawling activities. A colony of Harvester ants patrols the ground, on-duty and at rest. An ant colony is optimized for efficiency, but that doesn't mean that all ants are working all the time. In fact, having a surplus of members is an important f...
