Keystone Weather Forecasts

A lost city known only from inscriptions that existed some 1,200 years ago near Angkor in what is now Cambodia has been uncovered using airborne laser scanning.

As violent protests rock Istanbul, another cataclysm is building beneath the city.

Pregnant women who are exposed to high levels of air pollution may be more likely to give birth to children with autism, according to a new study.

By Gavin Jones ROME (Reuters) - It's a hot, sunny day in June on the beautiful Mediterranean island of Sicily, but the problem is that I'm not on the beach, I'm running up a volcano. An even bigger problem is that I've been going for two hours, but I'm only half way to the top and I'm tired. This is Mount Etna, at 3,330 …

Surprisingly, this island in the frigid North Atlantic is one of the most golf-obsessed places on earth. With 65 courses for a population of 322,000, Iceland has more courses per person - one for every 5,000 people - than any other country.

A normally dull star in Ursa Major, the Great Bear constellation, give off an incredible flare while scientists watched, increasing its brightness 15-fold in just three minutes, before returning to normal.

MIAMI (AP) — Forecasters say a tropical depression is expected to bring at least three to five inches of rain to parts of Guatemala, Belize, Honduras and southern Mexico.

LONDON - Come rain, wind or sunshine, the weather has long been one of Britain's main topics of conversation. Now it has also become a mystery.

By Environment Correspondent Alister Doyle OSLO (Reuters) - Few religious communities have gone as far in fighting climate change as a church in Queensland, Australia, which has 24 solar panels bolted to the roof in the shape of a Christian cross. "It's very effective. It's inspired some members of our congregation to install …

The circumstances surrounding the death of the first man in space Yuri Gagarin, who was killed in a 1968 jet crash, have long been clouded in theories and rumors. Now, the first man to walk in space says he can reveal what really happened to his friend and fellow Russian cosmonaut.

The uppermost reaches of the ocean could be rapidly scanned in groundbreaking high detail using acoustic techniques, researchers say. The method resembles that employed to probe the deep Earth.

CHANTILLY, Va. (AP) — The plane parked outside the airport looks more like a giant exotic insect or maybe an outsized balsa wood toy airplane.

WASHINGTON (AP) — A solar-powered plane nearing the close of a cross-continental journey landed at Dulles International Airport outside the nation's capital early Sunday, only one short leg to New York remaining on a voyage that opened in May.

This article was updated at 12:03 p.m. EDT.

As soon as the decades-old Twin Otter landed at Lukla airport, passengers burst out in applause. They do that for nearly every safe landing at the often terrifying airport at the gateway to Mount Everest. ...

COLORADO SPRINGS, Colo. (AP) — Firefighters could again get some help from rain Monday as they work to put out hot spots from the most destructive wildfire ever in Colorado.

As far as government schemes come, the NSA's super-surveillance PRISM program sounds like something straight out of dystopian science fiction.

Global greenhouse-gas emissions rose to record levels in 2012, the International Energy Agency said in a report released last week. Especially disconcerting is the news from May that carbon-dioxide levels reached 400 parts per million "for the first time in several hundred millennia," the report states.