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Finding a fitting future for stadiums

As the knockout stages of the 2010 FIFA World Cup begin, it's not only the teams dropping out of the tournament.

updated Sun Jun 27 2010 20:51:45

Finding a fitting future for stadiums

As the knockout stages of the 2010 FIFA World Cup begin, it's not only the teams dropping out of the tournament.

updated Sun Jun 06 2010 23:02:55

Join the Earth's Frontiers debate: Preservation or progress?

How can we balance progress and conservation?

updated Mon May 31 2010 23:10:46

How 'green' is the World Cup?

In homes and workplaces around the world it's hard to find someone who is not celebrating the imminent arrival of football's World Cup.

updated Sat May 22 2010 12:43:20

New species celebrated amid warnings of biodiversity loss

A flat-faced frogfish, bug-eating slug and carnivorous sea sponge are some of the top new species named by scientists.

updated Thu May 20 2010 22:47:48

Scientists create a living organism

Scientists have turned inanimate chemicals into a living organism in an experiment that raises profound questions about the essence of life.

updated Mon May 10 2010 21:01:58

The world's biodiversity hotspots

From the forests of Ecuador to the shore of the Aral Sea, in the coming months Earth's Frontiers will be exploring the rich diversity of life on our planet and the challenges of conservation.

updated Mon May 10 2010 02:19:22

Tracking tigers in Korea's DMZ

I am huddled in a sleeping bag in an old military tent near the Demilitarized Zone in South Korea. I am camping out with a band of men dedicated to protect their loved ones.

updated Fri May 07 2010 16:46:43

Neanderthal genome shines light on human evolution

An international team of scientists that spent more than a decade studying remains of Neanderthals has drafted the first genome sequence of humans' closest extinct biological relative.

updated Wed Apr 28 2010 17:19:59

Can world's largest laser zap Earth's energy woes?

Scientists at a government lab here are trying to use the world's largest laser -- it's the size of three football fields -- to set off a nuclear reaction so intense that it will make a star bloom on the surface of the Earth.

updated Wed Apr 14 2010 08:57:31

Archaeologists discover a Roman-era mummy

A Roman-era mummy was recently unearthed in a Bahariya Oasis cemetery, about 190 miles southwest of Cairo.

updated Tue Apr 13 2010 17:24:54

How scientists found world's deepest undersea volcanoes

A team of British scientists surprised the world this week with its discovery of volcanic vents spewing superheated water from a trench three miles below the surface of the Caribbean.

updated Mon Apr 12 2010 03:08:50

The stark reality of a throw-away society

I grew up on the shores of Sydney Harbor and I fondly remember exploring the crystal clear pools, observing the unique and bountiful marine life. Shells and driftwood, cuttlefish bones and dried seaweed littered the sand. That was the only debris from the ocean beyond that I saw.

updated Sun Apr 11 2010 22:56:01

Mega-dairies: Farming solution or big problem?

The plan for Britain's first "factory farm" for cows has stirred up the debate on the future of farming in Europe.

updated Thu Apr 08 2010 12:55:10

Ancient skeletal remains shed new light on evolution

Scientists may have discovered a new branch on your family tree.

updated Wed Apr 07 2010 15:37:37

Quake frequency normal, scientists say

Yes, it seems as if there have been a lot of strong earthquakes this year. And no, it's not a signal that the planet is coming apart at the seams, seismologists say.

updated Wed Apr 07 2010 01:46:37

Deadliest catch: Turtles die 'in their millions' from fishing lines

Millions of sea turtles have been the unintentional victims of the world's fisheries in the past 20 years, according to a report published Tuesday.

updated Wed Mar 31 2010 11:41:44

Q&A: 'Climategate' explained

On Tuesday November 17, a substantial file including over 1,000 e-mails either sent from or sent to members of the Climatic Research Unit (CRU) at the University of East Anglia in eastern England were allegedly hacked and leaked onto the Internet.

updated Tue Mar 30 2010 09:00:47

Scientist: Don't blame cows for climate change

A scientist in the United States has questioned the impact meat and diary production has on climate change, and accused the United Nations of exaggerating the link.

updated Tue Mar 30 2010 07:42:09

Hadron Collider breakthrough as beams collide

Scientists at the Large Hadron Collider managed to make two proton beams collide at high energy Tuesday, marking a "new territory" in physics, according to CERN, the European Organization for Nuclear Research.

updated Mon Mar 29 2010 07:00:52

Penguins lost in tropical Brazil

Located only 16 kilometers from Rio de Janeiro, Niteroi Zoo is home to dozens of animal species from this tropical region of Brazil. But lately the zoo has gained more recognition for its work in rescuing animals and returning them to their natural habitat than for its size or animal variety.

updated Thu Mar 25 2010 04:13:40

Report: Central African gorillas may go extinct

Gorillas may go extinct in much of central Africa by the mid-2020s -- victims of a meat trade, of logging and mining, and even the Ebola virus, a new report says.

updated Fri Mar 12 2010 19:57:57

Beheaded Vikings found at Olympic site

They were 51 young men who met a grisly death far from home, their heads chopped off and their bodies thrown into a mass grave.

updated Tue Mar 09 2010 12:16:06

Scientists reaffirm theory that giant asteroid killed dinosaurs

A team of scientists has agreed that a giant asteroid killed off dinosaurs and a majority of other species on Earth more than 65 million years ago.

updated Fri Mar 05 2010 07:47:22

Giant waves: Tall tales or alarming fact?

Cinemagoers will be familiar with the thrill of giant waves.

updated Thu Mar 04 2010 17:04:58

CNN Fact Check: Are recent earthquakes connected?

On January 12, a magnitude-7.0 quake struck Haiti just southwest of the capital, Port-au-Prince. On February 27, an 8.8-magnitude quake hit Chile near that nation's second largest city, Concepcion. That same day there was a 7.0 quake off the coast of Okinawa, Japan, and just this week a 6.4 quake hit southern Taiwan.

updated Mon Mar 01 2010 22:06:44

Weed killer 'castrates' male frogs, study says

Atrazine, a weed killer widely used in the Midwestern United States and other agricultural areas of the world, can chemically "castrate" male frogs and turn some into females, according to a new study.

updated Thu Feb 25 2010 04:06:44

Trek to gauge carbon's impact on Arctic sealife

Two teams of explorers and scientists are on their way to the Arctic for the first international project to measure the amount of carbon dioxide in water beneath the ice.

updated Thu Feb 25 2010 04:00:09

Arctic explorer prepares for icy swim

For polar explorer Ann Daniels, the worst part of this year's expedition to the Arctic won't be enduring bitterly cold temperatures or pulling a 100-kilogram (220-pound) sledge over steep jagged ridges.

updated Tue Feb 23 2010 04:15:52

U.N. climate chief to stand down

The head of the United Nations climate change convention is leaving his post, a move that comes a few months after the Copenhagen summit.

updated Wed Feb 17 2010 21:03:28

Half of world's primate species endangered, report says

Nearly half the world's primate species are in danger of extinction, according to a report released Wednesday by a major conservation group.

updated Wed Feb 10 2010 12:07:51

Launch of rocket with solar probe reset for Thursday

NASA has postponed for one day the scheduled launch of a rocket carrying a solar probe.

updated Wed Feb 10 2010 11:49:45

Tigers on verge of extinction in the wild, World Wildlife Fund warns

Tigers could become extinct in the wild in less than a generation, the World Wildlife Fund warned Wednesday as it launched a campaign to save them.

updated Wed Feb 10 2010 06:25:33

Cars of the future to power themselves

A car able to run solely on power generated from the material in its roof or door could offer a sustainable alternative to other eco-friendly motoring solutions, researchers say.

updated Mon Feb 08 2010 01:05:18

'Ranching' tuna the eco-friendly way

Tokihiko Okada has hundreds of children. Well, not literally, but you might as well call the giant bluefin tuna he cares for in the ocean tanks his "children."

updated Sun Jan 31 2010 18:50:49

Getting connected: Europe's green energy 'supergrid'

It is a criticism frequently leveled at those promoting wind or solar power as an alternative to fossil fuels: what happens when the wind doesn't blow or the sun doesn't shine?

updated Tue Jan 26 2010 16:39:54

Experts warned of Haiti earthquake risk

Scientists have warned for years that the island of Hispaniola, which Haiti shares with the Dominican Republic, was at risk for a major earthquake.

updated Tue Jan 26 2010 16:38:09

Measuring the magnitude of earthquakes

updated Fri Jan 22 2010 14:01:45

NASA: Last decade was warmest ever

The first decade of the 21st century was the warmest ever on Earth according to data released by scientists at NASA.

updated Wed Jan 20 2010 11:12:40

Is this how we'll be moving in the future?

updated Fri Jan 08 2010 00:24:32

'Water justice' advocate: Don't privatize

Every eight seconds, somewhere in the world a child dies from waterborne diseases because the parents cannot afford clean water, according to Maude Barlow, founder of the Blue Planet Project.

updated Wed Jan 06 2010 23:13:02

Top 10 environmental moments of the decade

What a difference a decade makes. Since the turn of the millennium environmental issues have come to the forefront with a marked shift toward all things green in politics, technology and perhaps most importantly, society.

updated Mon Jan 04 2010 23:30:08

After Copenhagen: Hope for the future

The UN Climate Change Conference in Copenhagen last December was widely portrayed as a failure. But just how bad was the result? And is there cause for optimism? CNN spoke to climate change expert Mark Lynas who was in the room with world leaders as key decisions were debated.

updated Tue Dec 22 2009 20:06:09

Are booming bioplastics here to stay?

As world leaders and their delegates trod the carpet thin at the United Nations climate summit in Copenhagen last week, one environmental solution to reduce greenhouse gas emissions was literally under their feet.

updated Fri Dec 18 2009 14:50:13

Scientists capture deepest underwater volcanic eruption on film

Scientists witnessed the eruption of the deepest underwater volcano and caught the entire event on film for the first time -- complete with molten lava and sulfur smoke clouds.

updated Wed Dec 16 2009 15:22:52

Experts clash at CNN/YouTube climate change debate

Thousands of people tuned in to watch the CNN/YouTube climate change debate, which took place Tuesday at the COP15 climate conference in Copenhagen, Denmark.

updated Thu Dec 10 2009 10:20:38

Giant iceberg heading toward Australia

A massive iceberg -- more than twice the size of New York's Manhattan island -- is drifting slowly toward Australia, scientists said Wednesday.

updated Wed Dec 09 2009 11:25:29

Unmanned research sub crosses Atlantic

A U.S.-built, unmanned mini-submarine on an ocean research mission has successfully crossed the North Atlantic by gliding on underwater currents, U.S. officials said Wednesday in Spain, where they came to retrieve it.

updated Tue Dec 08 2009 11:44:33

Comment: People power can drive change

In the run up to what some individuals and media outlets are labeling "the meeting of Humanity's future" all eyes will be on the 12,000-15,000 official U.N. accredited participants as well as the army of activists, media, business representatives and even skeptics.

updated Tue Dec 08 2009 11:37:51

Climate chief dismisses e-mail outrage

One of the world's leading authorities on climate change has dismissed the contents of controversial e-mails leaked from the University of East Anglia as nothing more than friends and colleagues "letting off steam."

updated Mon Dec 07 2009 21:16:32

U.N. official optimistic on climate accord

On the opening day of the global climate summit in Denmark, a key U.N. official said she is optimistic that there will be a binding international treaty next year to cut greenhouse gas emissions.

updated Mon Dec 07 2009 18:54:06

Can burying carbon emissions work?

Nestled in the heart of American coal country, on the banks of the Ohio River, an expensive, high-stakes experiment is under way -- one that could fundamentally alter the way the world manages carbon emissions.

updated Sun Dec 06 2009 22:55:24

UK Met Office to publish climate records

The UK's weather service, the Met Office is to publish station temperature records that make up the global land surface temperature record.

updated Fri Dec 04 2009 14:07:40

Scientists test climate change 'early-warning system'

An international team of scientists has developed a new method of measuring the absorption of CO2 by the oceans that could become an "early-warning system" for climate change.

updated Thu Dec 03 2009 11:49:48

Climate change threatens life in Shishmaref, Alaska

When the arctic winds howl and angry waves pummel the shore of this Inupiat Eskimo village, Shelton and Clara Kokeok fear that their house, already at the edge of the Earth, finally may plunge into the gray sea below.

updated Thu Dec 03 2009 09:08:51

G20 needs to 'quadruple' carbon intensity cuts

G20 economies need to quadruple cuts in their carbon intensity levels in the next ten years or risk a dangerous rise in global temperatures by 2050, according to new report.

updated Thu Dec 03 2009 04:37:36

Quiz: Do you know your eco-jargon?

updated Mon Nov 30 2009 01:24:38

New technology cleans up coal with CO2

The world has taken a step closer to "clean coal," thanks to new technology that actually uses CO2 to make power generation more efficient.

updated Wed Nov 25 2009 09:15:27

Massive icebergs floating towards coast of New Zealand

New Zealand is preparing for some rare spring visitors.

updated Wed Nov 25 2009 07:34:32

Dawkins: Evangelist an 'idiot' on evolution

A Christian evangelist branded an idiot by atheist biologist Richard Dawkins for trying to refute Charles Darwin's theory of evolution has brushed off the criticism.

updated Mon Nov 23 2009 09:40:24

Sea level rise could cost port cities $28 trillion

A possible rise in sea levels by 0.5 meters by 2050 could put at risk more than $28 trillion worth of assets in the world's largest coastal cities, according to a report compiled for the insurance industry.

updated Mon Nov 23 2009 02:48:40

Koreans make plastics without fossil fuel chemicals

A team of South Korean scientists have produced the polymers used for everyday plastics through bioengineering, rather than through the use of fossil fuel-based chemicals.

updated Sun Nov 22 2009 09:20:03

Project Kaisei: voyage to clean up the plastic vortex

A salty soup of seawater, microscopic pieces of plastic and marine debris. Those are the ingredients in the North Pacific Gyre, an ocean vortex estimated by Greenpeace to be the size of Texas, contaminated with the floating detritus of our modern lives.

updated Sun Nov 22 2009 08:25:40

Comment: We need leaders, not politicians

Today we face a perfect storm. As the crises related to the climate, economy, food and poverty collide and combine they threaten to overwhelm us.

updated Mon Nov 09 2009 03:49:51

Can cloud ships and space sun shades fix the planet?

In order to stop dangerous climate change we may be forced to construct giant solar shades and cover great swathes of land with artificial trees that suck up carbon dioxide.

updated Fri Nov 06 2009 08:27:31

Climate change: Can we even do it? Should we even try?

The Massachusetts Institute of Technology has long been known worldwide for its engineering programs, and a symposium at MIT this week will draw scientists from around the globe to focus on a hot facet of the field -- climate engineering.

updated Fri Nov 06 2009 08:25:09

Glaciers disappearing from Kilimanjaro

The ice and snow that cap majestic Mount Kilimanjaro in Tanzania are vanishing before our eyes.

updated Wed Nov 04 2009 10:39:13

Costing the Earth: Investing in protecting the planet

Coral reefs around the world are worth a staggering $172 billion dollars a year to the global economy. But the wealth of the oceans' reefs, and their amazing monetary value, is on the verge of being destroyed.

updated Wed Nov 04 2009 03:58:43

Plight of the albatrosses: Choking on plastic waste

Midway Atoll, a small stretch of sand and coral in the middle of the north Pacific, is home to one of the world's largest populations of Laysan Albatrosses.

updated Fri Oct 30 2009 11:06:31

Defriending can bruise your 'digital ego'

If you harbor a bit of angst over Facebook friend requests gone unanswered, a surprise "defriending" or being deserted by your Twitter followers, you're not alone.

updated Fri Oct 30 2009 05:33:09

Defriending can bruise your 'digital ego'

If you harbor a bit of angst over Facebook friend requests gone unanswered, a surprise "defriending" or being deserted by your Twitter followers, you're not alone.

updated Fri Oct 30 2009 03:15:33

Employing the fun theory

Making a set of subway stairs into a piano and a bottle bank into an arcade game; just two ingenious ways to get people to take time to do the right thing and have fun.

updated Thu Oct 29 2009 07:41:09

Blame genetics for bad driving, study finds

The next time you see a motorist obliviously straddling two lanes, don't fault bad driving, but genetics.

updated Wed Oct 28 2009 07:36:37

Sailing the Northwest Passage: epilogue

Silent Sound completed her voyage through the Canadian Arctic on October 10, four months and four days after slipping her moorings in Victoria, British Columbia.

updated Tue Oct 20 2009 14:55:00

'Imagineer' touts geothermal energy invention

Hidden under a quaint resort 60 miles northeast of Fairbanks, Alaska, lies a treasure trove of potential energy that's free and available 24/7.

updated Tue Oct 20 2009 03:08:26

Team California shine in Solar Decathlon

The smile never came off of my face as we heard who placed third, second, and first in the 2009 Solar Decathlon.

updated Mon Oct 19 2009 16:30:26

32 planets discovered outside solar system

Thirty-two planets have been discovered outside Earth's solar system through the use of a high-precision instrument installed at a Chilean telescope, an international team announced Monday.

updated Fri Oct 16 2009 17:08:18

Germany nabs second Solar Decathlon win

A university team from Germany has won the U.S. Energy Department's Solar Decathlon for the second competition in a row, officials declared Friday. In second place was Team Illinois, and third place went to Team California.

updated Thu Oct 15 2009 02:10:51

Going for gold in the Solar Decathlon

For two weeks the National Mall in Washington D.C. has been transformed into a boulevard of homes of the future.

updated Wed Oct 14 2009 20:48:19

Pterodactyl fossil fills gaps in evolutionary tale

Scientists say a very rare find of some 20 fossilized pterodactyls has produced the first clear evidence of a controversial theory of evolution.

updated Wed Oct 14 2009 09:28:14

Does your social class determine your online social network?

Like a lot of people, Anna Owens began using MySpace more than four years ago to keep in touch with friends who weren't in college.

updated Tue Oct 13 2009 11:26:28

'Mad scientist' to build greener future with 'megacrete'

Pliny Fisk III has been called a "mad scientist," a "dreamer" and a "visionary." His favorite word to describe the architectural work he does is "crazy."

updated Thu Oct 08 2009 23:10:22

Action man of adventure exploring ways to preserve the planet

"The Earth is just too small," sighed South African adventurer Mike Horn, one of the few people on the planet who can get away with saying such a statement.

updated Thu Oct 08 2009 14:57:06

NASA flights will study Antarctic ice changes

NASA plans to launch next week the first of 17 planned flights to study changes in Antarctic ice and collect data that may help scientists better predict the consequences of those changes, officials said Thursday.

updated Wed Oct 07 2009 12:16:17

Oldest human skeleton offers new clues to evolution

The oldest-known hominid skeleton was a 4-foot-tall female who walked upright more than 4 million years ago and offers new clues to how humans may have evolved, scientists say.

updated Mon Oct 05 2009 05:25:19

The high stakes of melting Himalayan glaciers

The glaciers in the Himalayas are receding quicker than those in other parts of the world and could disappear altogether by 2035 according to the 2007 Intergovernmental Panel on Climate Change (IPCC) report.

updated Fri Oct 02 2009 09:53:23

Fuel for thought: Film strives for energy answers

It's taken 11 years, thousands of miles and a few fistfuls of dollars for Josh Tickell to complete his film. But when you've devoted your life to a cause as important as helping save the planet, it's a small price to pay.

updated Tue Sep 29 2009 20:50:30

Risky business: insuring countries against climate catastrophe

The last 50 years have borne witness to a spate of climate-related disasters across the world causing over 800,000 fatalities and $1 trillion in economic losses.

updated Tue Sep 29 2009 03:34:51

Bird-eating frog among 163 new species found in Mekong region

A frog that eats birds and a gecko with leopard stripes are among the 163 new species discovered last year in the Greater Mekong region of southeast Asia, according to a report by the World Wildlife Fund.

updated Wed Sep 23 2009 11:23:23

Commentary: Real progress on climate change

On Tuesday, more than 100 world leaders gathered at the United Nations for a climate summit. They were called together by U.N. Secretary-General Ban Ki-moon to build momentum for the U.N. climate talks in Copenhagen, Denmark, this December.

updated Wed Sep 23 2009 08:31:52

European air safety agency orders Airbus part checked

A small part that tells computers on some highly-automated Airbus aircraft how fast the plane is flying became a concern again Wednesday.

updated Tue Sep 22 2009 16:45:31

Blame prolonged rains -- not big storms -- for Atlanta flood

Much of Atlanta is underwater. Highways and neighborhoods have been submerged. Creeks are swollen. Several are dead.

updated Tue Sep 22 2009 12:02:20

Climate change proposal would revolutionize value of forests

The world's tropical forests are disappearing, and one reason is simple economics: People, companies and governments earn more by logging, mining or farming places such as the Amazon jungle than by conserving them.

updated Tue Sep 22 2009 03:41:44

Greenland's frozen landscape warming up

My taxi driver is telling me about his meal last night. His name is William. He ate whale.

updated Sun Sep 20 2009 04:44:04

Sailing the Northwest Passage: mission accomplished

There are several definitions of where the Northwest Passage begins and ends, but using the Arctic Circle is certainly the most encompassing, so we've been holding our breath until we crossed this line.

updated Sun Sep 20 2009 04:43:42

Putting cattle on a diet to curb climate change

Much has been made of the problem of livestock emissions of methane -- a far more potent greenhouse gas than CO2 -- but a solution might be just around the corner.

updated Thu Sep 17 2009 19:49:31

Tiny T. rex fossil discovery startles scientists

A pint-sized version of the Tyrannosaurus rex, with similarly powerful legs, razor-sharp teeth and tiny arms, roamed China some 125 million years ago, said scientists who remain startled by the discovery.

updated Thu Sep 17 2009 10:10:28

Ancient bones seized, returned to China

Fossilized bones of a saber-toothed cat and dinosaurs that may be 100 million years old are among "priceless" artifacts that the United States handed over to China in a ceremony Monday.

updated Fri Sep 11 2009 11:10:33

Documentary looks at plight of the honeybee

"The Last Beekeeper" will change the way you see honeybees.

updated Thu Sep 10 2009 23:01:25

The changing face of the Arctic

The Arctic as we know it may soon be a thing of the past.

updated Mon Sep 07 2009 00:16:28

Feeding the future: Saving agricultural biodiversity

When the chips are down, the world may one day owe a debt of gratitude to a group of potato farmers high up in the mountains of Peru.