Colorado earthquake: A magnitude 5.3 earthquake shook the state late Monday, with an epicenter about 180 miles south of Denver, Colorado.
This month the US approved four wells for drilling by Shell Oil in the Arctic Ocean off Alaska, an energy frontier. But Shell's plan to recover after an oil spill is completely inadequate, given the region's remoteness and weather.
The failure of a recent expedition to find any invasive Asian carp near Lake Michigan – though DNA traces say they are there – has shipping interests claiming victory and others calling foul.
A timeline of the precious metal's effects on the world – from gold rush to gold standard.
After a Japanese researchers found rare earths near Hawaii, some are questioning the timing of the announcement
New Zealand earthquake early Thursday morning local time is magnitude 7.8. The New Zealand earthquake rattled the country's remote Kermadec Islands.
Japan earthquake: The magnitude 6.7 quake is the 75th aftershock of at least magnitude 6.0 following the devastating March earthquake in Japan.
Many studies have documented the West's declining snowpack. But a new one, published Friday in the journal Science, covers the length of the Rockies over an 800-year period.
Before the current levee system was built, Mississippi River floods helped replenish Louisiana coastal wetlands with silt. Now that silt goes into the Gulf and the coastline is disappearing. But scientists have a plan, and the great flood of 2011 could help them bring it about.
Spain earthquake: Two earthquakes that hit Lorca, Spain, Wednesday evening killed at least 9 people and injured hundreds. Thousands have been left homeless.