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  1. Chemistry

    Molecules, like Tinkertoys, link up

    Researchers have tailored molecules so that they self-assemble into predictable shapes on a gold surface.

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  2. Paleontology

    Even flossing wouldn’t have helped

    Small particles trapped in minuscule cracks or pits in the teeth of plant-eating dinosaurs could give scientists a way to identify the types of greenery the ancient herbivores were munching.

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  3. Paleontology

    CT scan unscrambles rare, ancient egg

    A tangled heap of bones and bone fragments in the bottom of an unhatched elephant bird egg may soon be reassembled into a model of the long-dead embryo, thanks to high technology—and scientists won't even have to crack open the egg to do it.