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E.g., 07/22/2019
Your search has returned 8 images:
  • mammoth, mastodon, and gomphothere
  • illustration of dinosaur doomsday
  • heather
Your search has returned 92 articles:
  • Feature

    How mammoths competed with other animals and lost

    The Gray Fossil Site, a sinkhole in northeastern Tennessee, is full of prehistoric treasures. Between 7 million and 4.5 million years ago, rhinoceroses, saber-toothed cats and other creatures, even red pandas, perished here by the edge of a pond. But that bounty of fossils pales next to the site’s biggest find: a mastodon’s skeleton, nearly 5 million years old, preserved in exquisite detail...

    11/13/2018 - 12:30 Ecosystems, Archaeology, Paleontology
  • Feature

    Devastation detectives try to solve dinosaur disappearance

    Below the shimmering turquoise waters of Mexico’s Yucatán Peninsula lies the scene of a prehistoric mass murder. In a geologic instant, most animal and plant species perished. Drilling through hundreds of meters of rock, investigators have finally reached the footprint left by the accused: Earth’s most notorious space rock impact, Chicxulub. The dinosaur killer.

    Sleuthing scientists are...

    01/25/2017 - 14:30 Earth, Paleontology
  • News

    Narrowed plumbing lets flower survive summer cold snaps

    A summertime cold snap can, quite literally, take the bloom off the rose. Not so for Scotch heather — and now scientists know why.

    Thick cell walls and narrow plumbing in the alpine shrub’s stems stop deadly ice crystals from spreading to its fragile flowers during sudden summer freezes, researchers report September 15 in PLOS ONE. That lets the flowers survive and the plant make seeds...

    09/23/2016 - 07:00 Plants
  • News

    Warming alters mountain plant’s sex ratios

    In Colorado’s Rocky Mountains, male and female valerian plants have responded differently to hotter, drier conditions, a new study shows. Rapidly changing ratios of the sexes could be a quick sign of climate change, the researchers say.

    Valerian (Valeriana edulis) plants range from hot, scrubby lowlands to cold alpine slopes. In each patch of plants, some are male and some are female....

    06/30/2016 - 18:04 Climate, Plants
  • Feature

    How species will, or won’t, manage in a warming world

    High in the Rocky Mountains of Colorado, mustard plants slumber through the winter in snow-covered meadows. When spring finally reveals these hardy perennials, the plants reach for the sky, unveiling tiny pink or white flowers.

    This annual rebirth is timed to the snowmelt, and as warmer temperatures have moved melting earlier and earlier in the year, this particular mustard, known as...

    07/11/2014 - 14:00 Climate, Ecology