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  1. Physics

    New supergas debuts

    A cloud of ultracold potassium atoms, manipulated by means of a magnetic field, has coalesced into a new super form of matter called a fermionic condensate.

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  2. Health & Medicine

    Some T cells may be a fetus’ best friend

    While pregnant, mice overproduce a kind of T cell that reins in other immune cells that might target the fetus.

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  3. Planetary Science

    A view of Mars, European style

    Although the Mars lander Beagle 2 is presumed dead, its mother craft, the European Space Agency's Mars Express, has transmitted its first data from a polar orbit about the Red Planet.

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  4. Math

    Computing on a Cellular Scale

    The behavior of leaf pores resembles that of mathematical systems known as cellular automata.