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The great potato famine of the 1840s was a defining event in Ireland’s recent history, when an Gorta Mór — the Great Hunger in the Irish language — caused millions to starve or emigrate and helped catalyse the country’s bloody war of independence from Great Britain.

A powerful tornado roared through Moore, Okla., and south Oklahoma City Monday, killing at least 51 people and leaving rescue workers frantically searching for survivors Monday evening at an elementary school.

After decades of dreaming and scheming, companies say they’re finally ready to start mining the bottom of the world’s oceans for valuable minerals. Christopher Werth reports from London on one company’s plans and how environmental scientists view the prospect of digging up the sea floor.

Agrichemical companies are taking initiatives to figure out why bees are dying off at a time when their best-selling pesticides are under fire from environmental and food activists who say it's the companies' chemicals to blame.

Water levels in U.S. aquifers, the vast underground storage areas tapped for agriculture, energy and human consumption, between 2000 and 2008 dropped at a rate that was almost three times as great as any time during the 20th century, U.S. officials said on Monday.

Environmental factors are responsible for 23 percent of the overall global disease burden, according to World Health Organization research. Addressing such pollution could save the lives of 6 million women a year.

The surprise discovery of rhinos with bright pink lips and swollen eyes in South Africa has raised alarm bells over the potentially devastating spread of an alien invader plant which can kill cattle and decimate the fields of peasant farmers.

It’s been more than 15 years since her husband died of a brain tumour, but Candide Bélanger feels she may finally get some answers about why he died. The couple had lived for 17 years next to the Valcartier military base, where many experts believe the drinking water was laced with TCE.

The rapid drop in Lake Malawi’s water levels, driven by population growth, climate change and deforestation, is threatening its flora and fauna – including the fish that fishermen depend on for a livelihood – with extinction, say Malawi officials.

More than two years into the triple-meltdown crisis at the Fukushima No. 1 power plant, workers continue to wage a desperate battle to keep the stricken reactors cool while trying to contain the 400 tons of radioactive water produced by the process each day.

Shipwrecks lying deep off America's coasts are more often historical artifacts than present-day threats from leaking old oil tanks, a new federal report says.

Efforts to protect Britain's trees from diseases and pests such as ash dieback and caterpillars that strip oaks of leaves are being hampered by a "skills gap", a government-appointed taskforce has warned.

U.S. regulators have indefinitely delayed a decision on the proposed restart of the shuttered San Onofre nuclear power plant in California, raising new questions Monday about whether the twin reactors will produce electricity again.

Both fine-particle air pollution and noise pollution may increase a person's risk of developing cardiovascular disease, according to a new study by German researchers.

In yet another strong sign that living close to major roads is significant health risk, researchers in Massachusetts found that prenatal exposure to ambient air pollution increases the risk of subsequent respiratory infection in children.

Citing "a preponderance of evidence" that indoor tanning greatly raises the risk of skin cancer, Councilman William Greenlee has introduced a bill that would restrict minors from using indoor-tanning facilities in Philadelphia without parental permission.

A team from Yale University in New Haven, Connecticut, found that cold temperatures dampen natural defenses against a rhinovirus, the leading cause of seasonal colds, in mice and in human airway cells.

Some hospital groups are measuring and reporting patients' cumulative medical radiation exposure from tests and scans, but the idea of hospitals collecting and reporting radiation doses for individual patients is controversial.

With summer swim season just a few weeks away, there's something the federal health department wants you to know about public pools: Most of them are swimming with fecal bacteria.

Estimated populations of South Australia's giant cuttlefish have fallen from 180,000 to just 20,000, with the University of Adelaide undertaking research to find what is causing the drastic fall.