Kennett Square, Pennsylvania, is the site of Longwood Gardens, a world-class horticultural display garden with a wide variety of plants and trees of both beauty and interest. The garden is the brainchild of its founder, industrialist and financier Pierre DuPont, who began constructing it in 1906. Longwood Gardens features many native and exotic plants both abundant and endangered. But one of the greatest attractions of this site is its water, light, and music show in the Main Fountain Garden. This water display features more than 1,700 jets of water that are programed to move to music. Some of the jets can hurl water up to 175 feet up in the air. The average show, which lasts about 12 minutes, involves recirculating more than 10,000 gallons of water per minute. In the video below you can see a portion of one of the shows during the day.
At night, the jets of water are illuminated by LED lights creating a stunning display of color. An additional feature of the show is the fire fountains. These are water fountains that have a fire burning at the top. This effect is achieved by injecting a stream of propane gas into the water jet and igniting it. In the video below you can see the fire fountains during part of one of the shows at night.
Many plants have coevolved with other organisms (pollinators) to such an extent that the main or only means the plant has of transporting the male elements (pollen) to the female element (ovule) to assure reproduction is through the intersession of the pollinator. And the same time, many pollinators have become dependent on the nectar and pollen produced by plants for their nutrition. It has been calculated that without pollinators a third of flowering plants would produce no seed and half of all flowering plants would have their fertility reduced by 80%. Pollinators are estimated to contribute 24 billion dollars each year to the US economy by making possible the reproduction of plants of economic importance. The phenomenon of pollination is an active area of research in disciplines such as ecology and evolutionary biology.
In the video bellow an Eastern Tiger Swallowtail butterfly (Papilio glaucus) feasts on the nectar of the flower of a thistle plant promoting its reproduction in the process.