Taxonomy term

april 2018

Travels in Geology: Underground awe in France: The caves of the Causses

The Causses du Quercy region in south-central France has been transformed into a karstic wonderland by the slow dissolution of limestone. The resulting caves, which served as shelters for early humans who left their bones, tools and art for us to ponder, are both geologically and paleoanthropologically fascinating.

06 Apr 2018

Red Planet Roundup: April 2018

With two rovers patrolling the surface of Mars, six spacecraft orbiting above it, and scientists here on Earth studying the Red Planet from afar, new findings are announced often. Here are a few of the latest updates.

05 Apr 2018

Earth's "hum" heard at ocean bottom

Lapping waves or crashing surf may come to mind for most people when they imagine the sounds of the ocean. But the ocean has other voices as well, including one produced by interactions of waves with the seafloor along the continental slope. Unlike waves on the shoreline, this steady, low sound, or “hum,” is inaudible to the human ear and has even proven difficult to detect in recordings made by ocean bottom seismometers (OBS). But in a new study in Geophysical Research Letters, researchers analyzing OBS data have now clearly identified the hum for the first time, which may allow it to be used to develop a better picture of Earth’s interior structure.

04 Apr 2018

Benchmarks: April 4, 2011: Air France Flight 447 wreckage found using modern oceanography tools

In the early morning hours of March 8, 2014, Malaysia Airlines flight 370 (MH370), en route from Kuala Lumpur to Beijing, lost communication with air traffic control during the transition between Malaysian and Vietnamese air space. It then disappeared, along with all 239 people aboard.

04 Apr 2018

Chemical tipping point triggers eruptive transitions

During an eruption, some volcanoes vacillate unpredictably between effusive and explosive behavior. New research has identified a chemical tipping point in some magmas that may trigger the transition between such mild and violent eruptive cycles.

02 Apr 2018

Where on Earth? - April 2018

Where on Earth was this picture taken? Use these clues to guess and submit your answer via mail, email or Web by the last day of the month (April 30, 2018).

01 Apr 2018

No river meant no floods for ancient Indus settlements

Large Middle Eastern rivers like the Nile, Tigris, Euphrates and Tiber were critical for the development of early urban societies in Egypt, Mesopotamia and Ancient Rome. And researchers have long thought that the rise, and eventual decline, of cities in the ancient Indus Civilization, which spread across about 1 million square kilometers of what’s now northwestern India and Pakistan from roughly 4,600 to 3,900 years ago, also depended on major rivers, namely those emerging from the Himalayas. But a new study looking at river sediments from the time of the civilization and earlier suggests that wasn’t the case for every ancient Indus city; some may have benefited from being farther away from large rivers and their periodic floods.

01 Apr 2018

Down to Earth With: Conservation engineer Emily Pidgeon

“I can be a very blunt object,” says Emily Pidgeon, describing how she moves through the world and how she approaches her work. Her Australian accent, drawling yet punctuated, rises above the din of the lunch crowd at a café. She pauses a moment, and declares herself a larrikin. “Do you know that word, larrikin?” She explains that Australians have a larrikin culture — they’re troublemakers, but in a good way. “We have a healthy disrespect for authority,” she says, sipping her tea.

30 Mar 2018

Oldest "Third Pole" ice core recovered

Holding massive reservoirs of ice, high-altitude glaciers, such as those in the Himalayas, are sometimes referred to as Earth’s “Third Pole.” The Guliya Ice Cap, on the Tibetan Plateau, has now produced the oldest ice ever drilled outside the Arctic or Antarctica.

29 Mar 2018

Ceres: A bright spot in the asteroid belt

Orbiting in the asteroid belt between Mars and Jupiter, Ceres is the nearest dwarf planet to Earth and the only one within the inner solar system. It has been studied closely by NASA’s Dawn spacecraft since March 2015.

28 Mar 2018