Christopher Joyce appears in the following:
Wednesday, December 02, 2015
Past U.S. leaders tried to commit the nation via treaty to steep cutbacks in greenhouse gases. But without congressional support, those pledges fizzled. President Obama is trying regulation, instead.
Monday, November 30, 2015
Negotiators and heads of state from nearly 200 countries are
meeting for the next two weeks near Paris to craft a new treaty to slow global warming.
It's the 21st "Conference of the Parties" held by the United Nations to tackle climate change. One treaty emerged, in 1997, after ...
Monday, November 30, 2015
The 1997 Kyoto treaty set targets for cutting greenhouse gas emissions that many nations didn't meet. This time, stakes are higher and
all countries will be asked to set and meet their own limits.
Thursday, October 08, 2015
Bull trout are dwindling in Montana as their home waters warm and invasive fish devour them. Scooping up threatened fish and moving them higher up the mountain could backfire. Is the risk worth it?
Thursday, October 01, 2015
Drills and screws would damage the frail, 65.5 million-year-old bones of the Smithsonian's 38-foot-long
Tyrannosaurus rex. So how do you make it stand? Blacksmiths in Canada are working their magic.
Friday, September 25, 2015
Chinese President Xi Jinping and President Obama agreed on at least one thing this week: They need to coordinate action to lower greenhouse gas emissions to combat climate change.
Thursday, September 10, 2015
Sound gets into our brains and processed so quickly that it shapes all other perceptions, says neuroscientist Seth Horowitz. "You hear anywhere from 20 to 100 times faster than you see."
Thursday, September 03, 2015
It can take more than just a keen ear to figure out what animals are saying. Sometimes, scientists are learning, you have to talk back to map the rich networks of conversation in a forest.
Thursday, August 27, 2015
For some insects, sound waves or vibrations are the real social media — high-speed rumbles sent through the air and along leaf stems to help the bugs claim territory, send warnings and find mates.
Thursday, August 20, 2015
The trumpeting roar of an elephant is loud. But scientists living with herds in the forests of central Africa say the deep rumbles that humans can't hear, but can feel, carry crucial messages, too.
Thursday, August 13, 2015
Christopher Clark, an engineer turned whale biologist, wired the world's oceans with hydrophones. Whales sing as they migrate, he learned. And the ship sounds clouding the ocean can deeply interfere.
Thursday, August 06, 2015
Male humpback whales create "songs" together, scientists say. Katy Payne was the first to hear the shifts in pitch and pattern in the collective calls as complex music — haunting, evolving tunes.
Monday, August 03, 2015
If the president's Clean Power Plan survives legal and political challenges, the nation's electricity industry will have 15 years to remake itself and reduce CO2 emissions by a hefty margin.
Thursday, July 30, 2015
The stethoscope seems so simple — a 19th century tool for listening more closely to the human heart or lungs. It also sparked a culture of listening that is transforming the way scientists learn.
Tuesday, July 28, 2015
Scientists say remains of four men exhumed from what was once an Anglican church suggest they were well-nourished, "high-status" leaders in the early 17th century colony. And one was likely Catholic.
Tuesday, July 21, 2015
Scientists assume a wave of people from what's now Siberia crossed into North America via Alaska, maybe 23,000 years ago. Genetics support that, but may also suggest another wave from Australasia.
Friday, July 17, 2015
The international report card is out and confirms the hottest average on record — for a third time in 15 years. More than 400 scientists contributed data, finding a spike in sea and air temperatures.
Monday, June 29, 2015
Monday's decision from the high court technically only applies to the Clean Air Act's standards on mercury emissions from power plants. But it could affect future EPA regulations, legal experts say.
Friday, June 19, 2015
To stop elephant slaughter in Africa, zoologist Sam Wasser spent years extracting DNA from elephant dung and tissue. Much of the world's poached ivory, he discovered, comes from just two hotspots.
Thursday, June 18, 2015
The new evidence suggests the ancient skeleton is closely related to members of a Washington state tribe. The findings are likely to rekindle an old debate between scientists and Native Americans.