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  • Bird's Eye View

    Bird's Eye View

    Image of the Week

    Unlike the human retina, in which red and green cones are randomly distributed, the five cone types of the bird’s retina are arranged in a highly regular mosaic.

  • Lightning-strike cabal acts like a Taser

    Lightning-strike cabal acts like a Taser

    Animation

    (2 min 9 sec) Some cone snail toxins chemically hyperactivate neurons and immobilize prey, much like a Taser.

  • Signal molecules trigger transcription factors

    Signal molecules trigger transcription factors

    Animation

    (2 min 4 sec) Varying concentrations of a signaling molecule activate different transcription factors and determine cell fate.