Methane, a gas that on Earth comes mainly from living organisms, has been measured for the first time making a sudden spike on Mars, leaving scientists puzzled about its origin.
The latest findings from NASA's Curiosity rover, which has been exploring the Red Planet since it landed in 2012, were published in the U.S. journal Science on Tuesday and raise the question, could microbes be the source of the methane? And what caused the levels to soar and dissipate again in a matter of weeks?Full Story
Waving his hands as if conducting an invisible orchestra, Juan Trujillo sings an old song known to Carmelita settlers living deep in northern Guatemala's Mayan jungle.
He walks through the hundred-year-old community, whose roots are deeply intertwined with that of the sapodilla tree, whose chicle resin was once widely used in chewing gum.Full Story
A Spanish court Tuesday fined Greenpeace and 16 of its activists 20,000 euros ($25,000) for damage caused during a protest at a nuclear plant but acquitted them of other, more serious charges.
The court in the eastern city of Valencia also cleared all charges against a photographer who accompanied the activists during the protest in February 2011, it said in a written ruling.Full Story
Sharks are hauled ashore every day at a busy market on the central Indonesian island of Lombok, the hub of a booming trade that provides a livelihood for local fishermen but is increasingly alarming environmentalists.
Now a Singaporean is luring the fishermen away from Tanjung Luar market, where an array of other sea creatures including manta rays and moray eels are also sold, by offering them jobs as local guides for the growing number of tourists visiting the island.Full Story
A rare species of rhinoceros is one member closer to extinction after one of only six surviving animals died, zoo keepers said Monday.
Northern white rhinoceros Angalifu, believed to be 44 years old, died on Sunday at San Diego Zoo possibly of old age, said spokeswoman Darla Davis, adding that post-mortem results were pending.Full Story
Humans tamed horses some 5,500 years ago, and an international study of ancient and modern horse genes Monday sheds light on the traits people saw as valuable, including speed, vigor and learning ability.
Researchers also discovered that a long-gone and previously unknown population of wild horses contributed a large chunk of genes to contemporary horses, according to the findings in the Proceedings of the National Academy of Sciences, a peer-reviewed U.S. journal.Full Story
The Earth is still on track for a record-breaking year for heat even though the average global temperature last month dipped to the seventh warmest since 1880, U.S. government scientists said Monday.
The globally averaged temperature over land and ocean surfaces in November 2014 tied with 2008 as the seventh warmest for the month since record keeping began, said the National Oceanic and Atmospheric Administration (NOAA).Full Story
People who own all-electric cars where coal generates the power may think they are helping the environment. But a new study finds their vehicles actually make the air dirtier, worsening global warming.
Ethanol isn't so green, either.Full Story
A carbon-curbing deal struck in Lima on Sunday was a watered-down compromise where national intransigence threatened the goal of a pact to save Earth's climate system, green groups said.
The hard-fought agreement sets out guidelines for the submission of national greenhouse-gas pledges next year.Full Story
A dead dolphin has been found in Bangladesh's protected Sundarbans delta following an oil spill which has spread over several hundred square kilometers, heightening fears for the area's rare wildlife.
The Dhaka Tribune newspaper published a photo of the mammal on Sunday, saying it was found floating in a canal off the Shela river where a crashed tanker has leaked thousands of litres of oil.Full Story