Christopher Joyce appears in the following:
Tuesday, August 23, 2016
Years of drought have strained California's forests, killing millions of trees and fueling wildfires.
Friday, August 19, 2016
July 2016 was Earth's hottest month on record. And Arctic ice has shrunk this year almost as much as it did in 2012 — the most severe melt to date.
Tuesday, August 09, 2016
The study finds, in many cases, amounts barely higher than government guidelines allow, but significant levels in 66 water supplies. The chemicals are very persistent once in the environment.
Friday, August 05, 2016
Camp Century was a research station and test site for deploying nuclear missiles before it was abandoned under the ice in the '60s. Scientists say pollutants left behind may spread as the ice melts.
Tuesday, July 19, 2016
For example, June's average was up 1.62 F. A couple of degrees may not sound like much, but it's persistent warming over decades that alters the atmosphere, the oceans, and most everything else.
Tuesday, July 19, 2016
During the 12 months from May 2015 to May 2016, each month set an all-time heat record. That's on average around the world. Some places were not record breakers, but overall, global warming is increasing. NASA scientists talk about what the rest of this year may look like, and whether it will set yet another global record.
Thursday, June 30, 2016
Scientists have been attaching transmitters on the huge seagoing birds and are astonished by their ability to stay aloft.
Wednesday, June 29, 2016
The National Park Service is racing to record soundscapes of each park that capture nature for the ear. "If we start to lose sounds of wilderness, we start to lose a piece of us," one scientist says.
Tuesday, June 28, 2016
Divers exploring the famous Antikythera shipwreck, 200 feet beneath the water's surface in Greece, have turned up a heavy object they think might have been a powerful weapon in the first century B.C.
Wednesday, June 08, 2016
Scientists say tiny bones dating back 700,000 years on the Indonesian island of Flores shine new light on how these mysterious, 3-foot-tall creatures got that way.
Thursday, May 26, 2016
Deep in a French cave, researchers have found numerous ovals of broken stalagmites. They believe the rings were arranged by ancient Neanderthals.
Wednesday, May 25, 2016
Rising sea levels put extra pressure on coastal bedrock in South Florida. Eventually, as seawater moves in, it could contaminate plants on the surface and the region's stores of freshwater beneath.
Tuesday, May 17, 2016
Already, neighborhoods flood more often in Coral Gables, Fla., and water has seeped up from beneath low-lying buildings and yards. Mayor James Cason wants his city prepared for the economic fallout.
Tuesday, April 26, 2016
A nearly complete fossilized skull from Argentina helps explains the success of these giant dinosaurs that roamed some 95 million years ago.
Friday, April 22, 2016
More than 100 nations will sign the climate change deal agreed to in December. It will eventually commit nealy all the world's governments to cut back on greenhouse gases that cause global warming.
Thursday, April 21, 2016
The two nations topping the world in greenhouse gas emissions agreed at the Paris talks to cut way back. But critics have stalled a key part of the U.S. plan, and China's good start may be fragile.
Wednesday, April 20, 2016
Researchers say climate change has made weather more pleasant in many parts of the U.S. Winters have been milder, and summers haven't become much hotter. But that's likely to change in coming years.
Tuesday, March 29, 2016
Parts of Oklahoma and Texas have about the same risk of an earthquake as parts of California, the maps show. Why? Wastewater that oil and gas operations are pumping into wells adds pressure on faults.
Wednesday, March 02, 2016
The 15-year project wasn't a flight of fancy. Biologists used a plane to successfully teach many young, captive-bred whooping cranes to migrate cross-country. But the birds aren't reproducing well.
Monday, February 22, 2016
Scientists say the buzz picked up by hydrophones in the Pacific may be caused by "fish farts" — the emptying of air bladders that let clouds of fish rise and fall during daily hunts for food.