All Habitat

Snow and sleet delayed the start of school in some areas of the Northeast Tuesday and made the morning commute an icy, slippery mess a day before spring starts. Storm-weary commuters in New England were hoping this would be the last snowstorm until next winter.

Thousands of sharks near shore are part of an annual migration of blacktip sharks moving into feeding grounds near Palm Beach, Fla.

Melting Arctic ice will create new sea routes, a new study says, including the potential for light ice-breakers to reach the North Pole. New Arctic shipping routes would still be seasonal rather than year-around.   

Royal Dutch Shell PLC announced Wednesday it would suspend drilling for oil in the Arctic Ocean in 2013. Shell has experienced several setbacks this winter in its Arctic oil drilling plans.

Asia Pulp & Paper Co. has promised to stop using wood from Indonesia's natural forests.  Unprecedented market pressures, driven in part by Barbie and Mickey Mouse, helped.

Increasing summer ice melt in the Arctic Ocean could shift global weather patterns and make polar waters more navigable. But scientists say forecasting Arctic ice and weather remains a massive challenge.

Federal officials propose listing wolverine as endangered because its cold-weather habitat could shrink as the climate warms. But US says it won't use wolverine's status to regulate greenhouse gases. 

A Mississippi River barge that crashed Sunday is still leaking oil. The accident occurred at one of the two most difficult turns on the river.

Polar air has brought further challenges to those trying to recover from Superstorm Sandy. The polar air mass trekked from the Midwest into the Northeast on Wednesday, prompting the National Weather Service to issue wind chill warnings across upstate New York and northern New England.

London Heathrow airport canceled about 130 flights Monday as snow and ice blanketed Western Europe. London Heathrow airport officials say they have spent millions improving its winter resilience since the airport was virtually shut down by snow for several days in December 2010.

The Keystone XL pipeline and global warming are a few of the energy issues on President Barack Obama's second-term agenda.  Obama blocked the Keystone XL pipeline last year, citing uncertainty over the conduit's route through environmentally sensitive land in Nebraska.

Beijing air pollution readings reached dangerous levels for the second straight day Saturday, officials warned. Air pollution is a major problem in Beijing and other parts of China, due to the country's rapid pace of industrialization and reliance on coal power.

The EPA announced Thursday that it issued Shell notices of air quality violations during its shortened Arctic drilling season. Shell has worked for years with the EPA on its air permit to operate in the Arctic.

A rare river otter is the first seen in San Francisco in decades.  River otters are a living barometer of water quality – if it's bad they cannot thrive.

Conflict over whether to allow more uranium mining at a Wyoming ranch exemplifies tensions between the feverish drive for domestic energy and the need to protect future water resources.

Galapagos tortoise became extinct after June death of Lonesome George. But scientists say cross-breeding could bring Galapagos tortoise back.

Wild boar attacks and injures four in a Berlin residential neighborhood before police shoot it. Wild boar are not uncommon in Germany, but wild boar attacks are.

The US Fish and Wildlife Service dropped federal protections for reintroduced wolves in Wyoming Friday, part of a decades-long plan to bring back the howling of wolves while allowing ‘trophy hunts’ for the apex predator.

The biggest demand for ivory is in China, so conservationists are trying to give Chinese consumers a greater understanding of poaching – with the help of Chinese celebrities like Yao Ming.