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Collage of a black and white finger holding a microchip on top of a colorful background of painterly strokes Graphic collage of a person standing in front of a lithium ion White text and logo on a blue background that says AAAS graphic with text on electricity bills Scientific data plot. The earth is in the lower left, looking out in the directions of the constellations Virgo, Serpens and Hercules to distances beyond 5 billion light years. As this video progresses, the vantage point sweeps through 20 degrees towards the constellations Bootes and Corona Borealis. Each colored point represents a galaxy, which in turn is composed of 100 billion to 1 trillion stars. Gravity has clustered the galaxies into structures called the “cosmic web”, with dense clusters, filaments and voids. Photo of scientists with a graphic overlay with the text "top 10 science stories of 2021" 3D image of melanin in a zebrafish sample captured by micro-computed tomography. (Credit: Spencer R. Katz and Daniel J. Vanselow/Penn State College of Medicine)