Scientists may be underestimating how plants will respond to rising global temperatures when they study hot summers but not ...

The clubmosses and their relatives are the most ancient group of vascular plants — plants with specialized tissue called xylem that transports water and nutrients throughout the plant. The only plant ...

They were non-vascular plants, like mosses and liverworts, that didn’t have deep roots. About 35 million years later, ice sheets briefly covered much of the planet and a mass extinction ensued.

The Late Ordovician period, ending 444 million years ago, was marked by the onset of glaciations. The expansion of non-vascular land plants accelerated chemical weathering and may have drawn down ...

Plants frozen alongside Ötzi hold clues to his final journey. Pictured: Ötzi displayed at the Archaeological Museum of Bolzano on February 28, 2011. Andrea Solero/AFP/Getty ...

Meanwhile, non-vascular plants have often shown negative responses to warming, raising concerns that they could decline globally as climate conditions continue to change.