Each night at sunset, a handful of plants "fall asleep." Species as diverse as legumes and daisies curl up their leaves and petals for the evening and do not unfurl until morning. Now, a new study ...

As early as 252 million years ago, some plants may have curled up their leaves at night for a cozy “sleep.” The two leaf fossils were discovered in a rock layer in southwestern China that dates to ...

Two-hundred-fifty million years ago, an insect got hungry for a midnight snack. It chewed through the wide leaf of a now-extinct gigantopterid plant, sowing rows of rounded punctures. The holes were ...