How the passing of time on Earth affects life on a variety of levels, from the daily opening of a flower's petals to the evolution of the horse. A swift journey through the seasons demonstrates how caribou spend most of their time on the move, while the flying squirrel's body clock, attuned to the rhythms of the Earth, is revealed to be the most accurate in nature.
Leonardo da Vinci is well known for his inventions as well as his art. New evidence shows that many of his ideas were realized long before he sketched them out in his notebooks-some even 1,700 years before him! Of these “inventions” Leonardo never affirmed that his projects came from his original ideas. The film features drawings of his most famous ideas and inventions some of which trace their original creation to ancient Greece while others were a product of the scientific inventions of golden age of Islamic learning. This knowledge seemed to be lost in Europe during the Dark Ages until the Renaissance when Leonardo recovered it.
Ever wonder how the heart symbol came to stand for the actual heart? And why do we speak of the heart as the seat of love, when love really happens in our brains? Is it true that animals only get a billion heartbeats? This week, we give you enough cool cardiac science to make your heart skip a beat.
Every 17 minutes in America, someone is killed with a gun. Politicians can't seem to stop the violence. But epidemiologists, psychologists and big data crunchers are discovering that gun crime spreads like a virus -and science may be able to stop its spread.
Did you know that bananas are berries, but strawberries aren’t? A lot of thought goes into classifying fruits and vegetables, and it all has to do with anatomy.