Featured series 
Tag: Materials Research Science and Engineering Center at Harvard
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Nation & World
Tailored to fit
The dramatic diversity of columbine flowers can be explained by a simple change in cell shape. To match the pollinators’ probing tongues, the flowers’ cells in floral spurs elongate, driving rapid speciation.
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Nation & World
What’s behind the predictably loopy gut
Between conception and birth, the human gut grows more than two meters long, looping and coiling within the tiny abdomen. Within a given species, the developing vertebrate gut always loops into the same formation — however, until now, it has not been clear why.
