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  • Person in gloves and a lab coat handles two mice. One is noticeably heavy. Caption: because a single gene is defective,

    Dr. Jeffery Friedman introduces the genes and circuits that control appetite, including the key role of leptin. Part of the 2004 Howard Hughes Holiday Lecture Series.

    (Source: DCMP)

  • Diagram of a human head with the path from the nostril to the sinuses highlighted. Caption: To get the full benefit of the smell,

    Reviews appetite and hunger. Shows the actions of a salivary gland, the swallowing reflex, and the powerful churning of the stomach as food is broken down and processed.

    (Source: DCMP)

  • Close up of small, black insects on foliage with holes eaten out of it. A human finger is touching the edge of the leaf and is giant in comparison to the insects. Caption: They're tiny in size but have a huge appetite.

    The garden gets many visitors from insects and animals. Gardeners work hard to keep destructive pests out of the garden, but they also welcome animals that are helpful to the plants in the garden. Part of the "Four Seasons in the Garden" series.

    (Source: DCMP)

  • A man in a suit and tie looking downward with a painting and a map on the wall behind him. Caption: he wrote fake customs documents.

    Part of "Life on the Edge" series. With growing global appetite for sushi, bluefin tuna is big business, and one can sell for up to a hundred thousand dollars. But scientists and environmentalists now argue that Atlantic bluefin caught in the Mediterranean is on the verge of collapse and that the rules designed to protect them aren't working.

    (Source: DCMP)

  • Congested city street, hazy with smog. Caption: the emission of carbon dioxide and other greenhouse gases.

    Humanity's appetite for the earth's resources and consumer goods has led to increased levels of carbon dioxide entering the atmosphere, trapping more heat from the sun, and leading to the warming of the atmosphere. Argues that action could and should be taken at both international and political levels. Also addresses the question of what each individual can do to reduce his/her use of nonrenewable energy sources and lower each personal "carbon footprint" on the planet.

    (Source: DCMP)

  • A man in a white lab coat looking into a microscope. Caption: Examination back in the lab can confirm the species of fern.

    In the dark recesses of a warehouse, a drunken game of cards explodes into a murder. Now the night watchman lays dead. The only witnesses are a housefly or perhaps a cockroach that might be skittering by. That stylized tribute to our seemingly endless appetite for TV programs about forensic science sets the stage for an examination of how, in the real world of police investigations, nature is being enlisted in the war on crime. Sifts through the mayhem, murder, and science that make up the world of forensic investigation with the help of Dr. Jennifer Gardy, of British Columbia's Centre for Disease Control (CDC).

    (Source: DCMP)

  • Model of a human head being brushed by whiskers attached to wires protruding from a metal post. Caption: by a set of artificial wire whiskers,

    The image of a rat sniffing around for food with its little whiskers moving back and forth to help satisfy its appetite is enough to make most people lose theirs. But those whiskers play a valuable role in helping rats determine what is in the environment around them. With support from the National Science Foundation, Mitra Hartmann and colleagues at Northwestern University in Chicago are constructing whiskered robots that can detect and then project three-dimensional virtual images of objects on to a computer screen. Scientists here don't think it's so far-fetched that one day robotic rovers, much like the ones on Mars now, might contain a set of whiskers to help them navigate the terrain around them.

    (Source: DCMP)