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E.g., 06/30/2017
Your search has returned 280 images:
  • damselfly
  • false-color map of seafloor showing tracks of icebergs
Your search has returned 510 articles:
  • Science Ticker

    Higher temperatures could trigger an uptick in damselfly cannibalism

    A warmer climate could put some damselflies in distress, as others get bigger and hungrier.

    Because of differences in hatching time, nymphs — the immature form of the insects — vary in size. Sometimes when ponds are overcrowded, other food options are scarce or size differences are significant, bigger, older nymphs nosh on the little nymphs. While temperature doesn’t typically affect...

    05/16/2017 - 19:05 Climate, Animals, Ecology
  • Science Visualized

    Stunning images reveal glacial landscapes under the oceans

    View the slideshow

    The footprints of long-gone glaciers and icebergs are now frozen in time in a stunning new collection of images of Earth’s seafloor.

    The Atlas of Submarine Glacial Landforms is a comprehensive, high-resolution atlas of underwater landscapes that have been shaped by glaciers, largely in polar and subpolar regions, and provides a comparative look at how glaciers,...

    05/12/2017 - 11:00 Earth, Climate, Oceans
  • Say What?

    Ice particles shaped like lollipops fall from clouds

    Ice-Lolly\AIS LOL-ee\ n.

    A small ice particle made of a needle-shaped ice crystal and a single drizzle-sized water droplet

    Right now, somewhere in the world, it could be raining lollies. A 2009 research flight through clouds above the British Isles gathered ice particles with an unusually sweet look. Each millimeter-sized particle consisted of a stick-shaped piece of ice with a single...

    05/10/2017 - 07:00 Earth, Climate
  • News

    Sea creatures’ sticky ‘mucus houses’ catch ocean carbon really fast

    View the video

    Never underestimate the value of a disposable mucus house.

    Filmy, see-through envelopes of mucus, called “houses,” get discarded daily by the largest of the sea creatures that exude them. The old houses, often more than a meter across, sink toward the ocean bottom carrying with them plankton and other biological tidbits snagged in their goo.

    Now, scientists...

    05/04/2017 - 13:28 Animals, Oceans, Climate
  • Science Ticker

    Crack in Antarctica’s Larsen C ice shelf forks

    The 180-kilometer-long crack threatening one of Antarctica’s largest ice shelves has branched out, new satellite observations reveal. The main rift in the Larsen C ice shelf hasn’t grown longer since February. But radar mapping shows that a second crack has split off from the main rupture like a snake’s forked tongue, members of the Antarctic research group Project MIDAS reported May 1. That...

    05/02/2017 - 16:39 Earth, Climate
  • News in Brief

    Crack in Antarctica’s Larsen C ice shelf forks

    The 180-kilometer-long crack threatening one of Antarctica’s largest ice shelves has branched out, new satellite observations reveal. The main rift in the Larsen C ice shelf hasn’t grown longer since February. But radar mapping shows that a crack has split off from the main rupture like a snake’s forked tongue, members of Project MIDAS, an Antarctic research group, report May 1. That new...

    05/02/2017 - 16:39 Earth, Climate
  • Soapbox

    Radical idea could restore ice in the Arctic Ocean

    Leave it to a researcher who studies icy moons in the outer solar system to come up with an out-there scheme to restore vanishing sea ice in the Arctic.

    Ice is a good insulator, says Steven Desch, a planetary scientist at Arizona State University in Tempe. That’s why moons such as Jupiter’s Europa and Saturn’s Enceladus, among others, may be able to maintain liquid oceans beneath their...

    05/02/2017 - 10:00 Climate, Earth, Oceans
  • Feature

    Lakes worldwide feel the heat from climate change

    About 40 kilometers off Michigan’s Keweenaw Peninsula, in the waters of Lake Superior, rises the stone lighthouse of Stannard Rock. Since 1882, it has warned sailors in Great Lakes shipping lanes away from a dangerous shoal. But today, Stannard Rock also helps scientists monitor another danger: climate change.

    Since 2008, a meteorological station at the lighthouse has been measuring...

    05/01/2017 - 07:00 Climate, Ecosystems
  • News

    Ocean acidification may hamper food web’s nitrogen-fixing heroes

    A hard look at experimental setups may start to explain dueling predictions on whether ocean acidification will boost, or choke, vital marine nitrogen fixers. So far, the new look trends toward choking.

    As people release more and more carbon dioxide into the air, the ocean takes up the gas and edges closer toward acidity. In these shifting waters, marine microbes called Trichodesmium...

    04/28/2017 - 13:00 Climate, Microbes
  • News

    Plot twist in methane mystery blames chemistry, not emissions, for recent rise

    A recent upsurge in planet-warming methane may not be caused by increasing emissions, as previously thought, but by methane lingering longer in the atmosphere.

    That’s the conclusion of two independent studies that indirectly tracked concentrations of hydroxyl, a highly reactive chemical that rips methane molecules apart. Hydroxyl levels in the atmosphere decreased roughly 7 or 8 percent...

    04/20/2017 - 08:00 Climate, Pollution, Chemistry