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E.g., 11/14/2018
E.g., 11/14/2018
Your search has returned 335 images:
  • bread-crust bubble ash samples
  • Earth's magnetic field
  • illustration of cosmic rays
Your search has returned 1052 articles:
  • Say What?

    These tiny, crackly bubbles are a new type of volcanic ash

    Bread-crust bubble\Bred krəst ˈbəb(ə)l\ n.

    Tiny, gas-filled beads of volcanic ash with a scaly surface.

    Scientists have identified a new type of volcanic ash that erupted from a volcano in central Oregon roughly 7 million years ago. The particles are similar to larger bread-crust bombs, which form as gases trapped inside globs of lava expand, cracking the bombs’ tough exterior. Bread-...

    11/09/2018 - 12:00 Earth
  • News in Brief

    Bizarre metals may help unlock mysteries of how Earth’s magnetic field forms

    Weird materials called Weyl metals might reveal the secrets of how Earth gets its magnetic field.

    The substances could generate a dynamo effect, the process by which a swirling, electrically conductive material creates a magnetic field, a team of scientists reports in the Oct. 26 Physical Review Letters.

    Dynamos are common in the universe, producing the magnetic fields of the Earth...

    11/07/2018 - 06:00 Condensed Matter, Earth
  • News in Brief

    Physicists measured Earth’s mass using neutrinos for the first time

    Puny particles have given scientists a glimpse inside the Earth.

    For the first time, physicists have measured the planet’s mass using neutrinos, minuscule subatomic particles that can pass straight through the entire planet. Researchers also used the particles to probe the Earth’s innards, studying how the planet’s density varies from crust to core.

    Typically, scientists determine...

    11/05/2018 - 11:00 Particle Physics, Earth
  • Reviews & Previews

    ‘18 Miles’ is full of interesting tales about Earth’s atmosphere

    18 MilesChristopher DewdneyECW Press, $17.95

    How thick is Earth’s atmosphere? Sorry, that’s a bit of a trick question: Our planet’s air simply gets thinner with altitude, fading away to nothingness somewhere far above the height at which the lowest satellites orbit. It’s a fact, though, that 99 percent of Earth’s air lies below an altitude of 18 miles. Naturalist Christopher...

    10/28/2018 - 08:00 Climate, Earth, History of Science
  • News

    These ancient mounds may not be the earliest fossils on Earth after all

    Tiny mounds touted as the earliest fossilized evidence of life on Earth may just be twisted rock.

    Found in 3.7-billion-year-old rocks in Greenland, the mounds strongly resemble cone-shaped microbial mats called stromatolites, researchers reported in 2016. But a new analysis of the shape, internal layers and chemistry of the structures suggests that the mounds weren’t shaped by microbes...

    10/17/2018 - 13:00 Earth, Paleontology, Microbes
  • News

    These light-loving bacteria may survive surprisingly deep underground

    Deep below Earth's surface, life finds a way.

    Traces of cyanobacteria have been found more than 600 meters underground in a rocky outcrop in Spain, suggesting the microbes can survive without sunlight. Instead of photosynthesizing like others of their kind, these light-starved microorganisms may create energy using hydrogen, researchers report October 1 in the Proceedings of the National...

    10/09/2018 - 16:13 Earth, Microbes
  • News

    Tracking how rainfall morphs Earth’s surface could help forecast flooding

    By mapping how downpours cause Earth’s crust to sag and swell, scientists may one day better forecast floods.

    When Hurricane Harvey struck the southern United States in August 2017, it crushed rainfall records and doused the region with roughly 95 cubic kilometers of water, leaving cities like Houston inundated. Using daily elevation data from 219 GPS stations along Harvey’s path,...

    10/02/2018 - 09:00 Climate, Earth
  • Feature

    Christopher Hamilton explores the architecture of other worlds

    Christopher Hamilton, 39Planetary scienceUniversity of Arizona

    Christopher Hamilton wanted to be an architect.

    Yet the planetary scientist at the University of Arizona in Tucson is exploring a very different kind of built environment: the strange structures created by volcanoes on worlds across the solar system, from Earth to Mars to the moon.

    And he’s using an unusually...

    09/26/2018 - 08:32 Earth, Planetary Science
  • News

    A new map reveals the causes of forest loss worldwide

    If a tree falls in the forest, will another replace it?

    Of the roughly 3 million square kilometers of forest lost worldwide from 2001 to 2015, a new analysis suggests that 27 percent of that loss was permanent — the result of land being converted for industrial agriculture to meet global demand for products such as soy, timber, beef and palm oil. The other 73 percent of deforestation...

    09/13/2018 - 16:47 Earth, Earth, Agriculture
  • News

    Sea level rise doesn’t necessarily spell doom for coastal wetlands

    Rising sea levels don’t have to spell doom for the world’s coastal wetlands. A new study suggests salt marshes and other wetlands could accumulate soil quickly enough to avoid becoming fully submerged — if humans are willing to give them a little elbow room.

    The new study builds on previous work that suggests rising seas will increase sediment buildup in some parts of coastal wetlands....

    09/12/2018 - 14:06 Earth, Climate