Planet Earth Archive
06 May 2015, 04:24 PM ET
Global carbon dioxide levels have now officially reached the 400 ppm level, a first for the planet.
06 May 2015, 11:01 AM ET
During the rainy fall and winter, most Oregonians probably don't give much thought to Lost Lake, a shallow 85-acre (0.34 square kilometers) lake surrounded by pine trees that sits near a highway.
06 May 2015, 07:09 AM ET
For the first time, scientists have imaged thunder, shedding light on the physical processes that create it.
05 May 2015, 04:59 PM ET
Forest Service anticipates spending up to $1.6 billion fighting a fire season that could be worse than normal.
05 May 2015, 04:40 PM ET
The nation's capital sits on shaky ground that jiggles like pudding when earthquakes rattle the East Coast.
05 May 2015, 03:37 PM ET
Researchers looking to capture the acoustic signature of thunder had to make their own lighting.
05 May 2015, 01:31 PM ET
From bagging a comet to filtering water on Mars, scientists are working on a number of crazy solutions to the world's coming water crisis.
05 May 2015, 10:40 AM ET
The Chicxulub meteor impact 66 million years ago may have triggered a magnitude-11 earthquake that shook loose massive amounts of lava in India.
05 May 2015, 01:17 AM ET
Nepal is a narrow, landlocked country directly north of India and below China. Located where two tectonic plates meet, it the area is prone to earthquakes.
04 May 2015, 07:18 PM ET
Prized by American Indians for their bows and American colonists for their timbers, the black locust is the tree that built the United States.
04 May 2015, 02:00 PM ET
When disasters like the Nepal earthquake strike, seemingly out of the blue, one can’t help but feel anguish at the mismatch between the capacity of human memory and the tenacity of denial.
04 May 2015, 01:25 PM ET
Two super-fast conveyor belts of sinking crust explain why India set a continental speed record as it crashed into Eurasia.
04 May 2015, 07:13 AM ET
In a stroke of luck, no major hurricanes rated Category 3 or higher have struck U.S. soil during the past nine years, a new study finds.
02 May 2015, 07:12 AM ET
A stark black disc haloed by streaks of light — a team of scientists captured this image of a total solar eclipse over the Arctic in March.
01 May 2015, 04:54 PM ET
An underwater volcano off the West Coast of North America is showing telltale signs of an eruption, just as scientists had predicted. Motions of the seafloor, accompanied by a series of earthquakes, suggest a large amount of magma was released from the vo
01 May 2015, 03:16 PM ET
An underwater volcano off the coast of Oregon has risen from its slumber and may be spewing out lava about a mile beneath the sea.
01 May 2015, 03:03 PM ET
The sound was recorded by a UNC Chapel Hill payload aboard a high altitude balloon. The balloon was commissioned by Louisiana State University's High Altitude Student Platform (HASP) program and flew to an altitude of ~22 miles in 2014.
01 May 2015, 11:51 AM ET
Scientists are striving to learn from the latest volcanic eruption in Chile.
01 May 2015, 11:46 AM ET
The Nasca Lines, a series of strange etchings in the barren Peruvian desert, may have been viewed on ritual processionals to an ancient temple.
01 May 2015, 09:57 AM ET
It's possible that thousands of ivory objects — from kitschy trinkets to carved tusks — worth more than $15 million are being traded each year on Craigslist in the United States, according to a new report.
01 May 2015, 06:54 AM ET
Measuring a mountain relies on an incredibly tedious, and relatively low-tech series of trigonometric equations.
30 April 2015, 04:20 PM ET
A new study finds that the biggest aftershocks tend to strike at the edge of the original earthquake.
30 April 2015, 08:08 AM ET
Researchers detected a vertical lift of about 3 feet of a broad swath of ground near Kathmandu linked to the Nepal earthquake. Here are the radar images showing the quake's effects.
29 April 2015, 10:13 PM ET
The first good satellite view of Nepal's deadly earthquake could explain why damage in the city was so severe.
29 April 2015, 04:51 PM ET
For the first time in more than 30 years, lava is flowing on the floor of Halema'uma'u crater in Hawaii.
29 April 2015, 03:21 PM ET
An emerging body of research shows that greenhouse gases are billowing out of the state’s woodlands.
29 April 2015, 01:16 PM ET
At about 10:20 am Hawaii time on April 28, a rockfall sloughing off the wall of Halema'uma'u Crater hit the molten lava beneath, triggering an explosion of magma fragments.
29 April 2015, 12:12 PM ET
The Coast Guard usually tries to find ships before they sink. But during a recent patrol over Lake Michigan, an aircrew spotted several historic wrecks in the clear waters.
29 April 2015, 11:56 AM ET
After an icy winter, springtime brought crystal clear waters to Lake Michigan. An aircrew with the Coast Guard spotted several shipwrecks during a routine patrol this month.
28 April 2015, 06:21 PM ET
The roiling lava lake atop Hawaii's Kilauea volcano is threatening to overflow for the first time since the molten pool appeared in 2010.
28 April 2015, 04:22 PM ET
An airborne research team, supported by the NSF, scanned the McMurdo Dry Valleys revealing "salt aquifers” beneath the glaciers, lakes and frozen soils. Microbial life could thrive there, retaining evidence of ancient climate change.
28 April 2015, 03:41 PM ET
Photos of the lava lake in Kilauea volcano's Halemau'mau' crater, which is close to overflowing.