June 20, 2018
Energy Notes: May 2008-2009
U.S. Oil & Petroleum Imports (millions of barrels per day) Oil and petroleum imports data are preliminary numbers taken from the American …
The EARTH archive
September 2009
Explore the archive by subject.
19 articles · Page 1 of 1
June 14, 2018
Mineral Resource of the Month: Cobalt
Kim B. Shedd, a mineral commodity specialist for the U.S. Geological Survey, compiled the following information on cobalt, a metal used to power …
May 23, 2018
Down to Earth With: Peter Brewer
Whether through deep-sea gas hydrate experiments, lasers or asphyxiating squid, Peter Brewer is always seeking new ways to understand the …
September 1, 2015
Benchmarks: September 16, 1987: Montreal Protocol Signed
Each year in late September to early October, atmospheric scientists watch with anticipation as ozone concentrations over Antarctica drop, …
January 5, 2012
Travels in Geology: Arkansas: A geologic diamond in the rough
If the budget belt is a little tighter this year, consider packing your diamond-digging trowel, bathing suit and camping gear and heading to a …
January 5, 2012
The cosmos on key
Engebretson’s latest project involves taking the orbital periods of all eight planets in the solar system and turning them into corresponding …
January 5, 2012
Surviving field school: Better than reality TV
David Harwood’s geology field course for future teachers is not a network reality show — but it should be. The three-week course has all the …
January 5, 2012
Scores dead, injured following Indonesian earthquake
A powerful magnitude-7.0 earthquake struck a few kilometers off the coast of West Java, Indonesia, at 2:55 p.m. local time on Wednesday, …
January 5, 2012
Redefining Quaternary
Blogging on EARTH The Quaternary Period — the geologic time period that includes human evolution up to the present — is now a bit longer than it …
January 5, 2012
Putting Earth's history to sound
Geophysicist Dave Engebretson of Western Washington University in Bellingham has struggled with his eyesight since birth. But when his vision …
January 5, 2012
Powerful earthquake strikes Samoa
Updated on Sept. 30: A tsunami spawned by Tuesday's earthquake, which struck in the Pacific Ocean between American Samoa and Samoa, swept across …
January 5, 2012
Moon much wetter than thought
The moon isn’t quite the bone-dry place scientists once thought; instead, its surface is covered in water, according to a landmark finding …
January 5, 2012
Mini-T. rex fossil found in China
The Tyrannosaurus rex — arguably the most famous dinosaur of all time — was also one of the most efficient predators to ever walk on Earth. With …
January 5, 2012
Mars' ice is pure, not dirty
Blogging on EARTH Finding signs of water on Mars feels nearly old hat by now. We know Mars had a lot more water in its past, has polar ice …
January 5, 2012
Getting a master's in social geology
At first glance, it seems like an obvious solution to a problem: Villagers need vegetables and an aid organization has money to buy tools and …
January 5, 2012
Geology 101: Reading the story in the rocks
David Harwood’s field geology course gives future teachers an introduction to several of geology’s most fundamental principles, including the …
January 5, 2012
Earthquake rocks Sumatra
Updated on Oct. 1: A second, magnitude-6.6 earthquake struck southern Sumatra, Indonesia, today at about 8:52 a.m. local time; this time, the …
January 5, 2012
Earth tides in A major
Earth experiences small, millimeter-sized tides, called Earth tides. Using a dataset from NASA’s Jet Propulsion Laboratory in California from …
January 5, 2012
Art and dinosaurs
Lillian the Albertosaur strolls through the halls of the American Museum of Natural History in New York City, glancing sideways at the skeletal …