Rivadavia Weather Forecasts

(Reuters) - The death toll from a huge tornado that struck Moore, Oklahoma on Monday rose to 51, the state medical examiner's office said. Amy Elliott, chief administrative officer of the Oklahoma medical examiner's office, said 51 were confirmed dead, up from 37 fatalities reported earlier. The powerful tornado, rated …

LONDON — The first British astronaut ever to visit the International Space Station will launch in 2015 for a six-month mission that may involve spacewalks, wrangling visiting robotic spacecraft and space experiments, the UK Space Agency announced today (May 20).

Eye-popping images of celestial wonders shining over equally stunning Earth views have won the top spots in the 2013 International Earth and Sky Photo Contest, competition organizers say.

SHAWNEE, Okla. (AP) — When Lindsay Carter heard on the radio that a violent storm was approaching her rural Oklahoma neighborhood, she gathered her belongings and fled. When she returned, there was little left of the community Carter had called home.

A psychological warfare program centered on vomit could help save the marbled murrelet, an endangered seabird that nests in California's old-growth redwood forests.

SAN MATEO, Calif. — The word "drone" tends to conjure up images of planes that kill terrorists or of creepy surveillance tools.

Whether or not NASA's Kepler spacecraft can bounce back from the malfunction that has stalled its search for alien planets, the mission's place in history is assured, scientists say.

GRANDE RIVIERE, Trinidad (AP) — Giant leatherback turtles, some weighing half as much as a small car, drag themselves out of the ocean and up the sloping shore on the northeastern coast of Trinidad while villagers await wearing dimmed headlamps in the dark. Their black carapaces glistening, the turtles inch along the moonlit …

The moon generated a surprisingly intense magnetic field until at least 3.56 billion years ago, 160 million years longer than previously thought, a new study reports.

A new stem cell discovery has reawakened controversy about human cloning — though technical challenges mean scientists are far from being able to create human babies as in Michael Bay's 2005 sci-fi flick "The Island."

Sometimes, numbers are the only way to tell the true tale of a disaster incomprehensible in scale and indescribable in words. For the victims of Hurricane Sandy, those numbers paint a bleak picture. The storm is estimated to have caused between $50 …

SANTA CLARITA, Calif. (AP) — As firefighters took on a stubborn 3-day-old wildfire Friday in rough terrain north of Los Angeles, a second and more serious blaze broke out 30 miles away near Interstate 5, quickly surging to more than 500 acres, briefly threatening an elementary school and leading to the precautionary evacuation …

Harlequin ladybirds carry a parasite that does not kill them--but does kill other ladybug species that attempt to eat the harlequin progeny. Sophie Bushwick reports

By Jana J. Pruet GRANBURY, Texas (Reuters) - All seven of the people listed missing after a monster tornado on Wednesday have now been accounted for in Granbury, Texas, leaving the death toll at six, authorities said on Friday. Workers were clearing debris to allow residents of the most damaged areas to return to see the …

The moon has a new hole on its surface thanks to a boulder that slammed into it in March, creating the biggest explosion scientists have seen on the moon since they started monitoring it.

Spring sprung early in 2012, breaking records across the lower 48 states, a new study finds.

GRANBURY, Texas (AP) — Raul Rodriguez counts himself a lucky man.

The news that researchers have used cloning to make human embryos for the purpose of producing stem cells may have some people wondering if it would ever be possible to clone a person.