The California-based company SpaceX on Saturday scrubbed the launch of its Dragon capsule toward the International Space Station at the last second due to a rocket engine problem.

The abort came a half-second before liftoff due to high pressure in the center engine of the Falcon 9 rocket, forcing a shutdown of the launch attempt. The next try is expected May 22 at 3:44 am (0744 GMT).

Japan joined the commercial space race Friday after its workhorse rocket put a paid-for South Korean satellite into orbit, pitting the country against Russia and Europe in the competition for customers.

But despite a degree of self-congratulation, space officials admitted they had to work hard to lower their prices if they were going to become truly competitive.

Special darkened glasses were selling out in Japan on Friday as anticipation built ahead of a "ring" solar eclipse above one of the most densely populated parts of the planet.

A swathe of the country will be able to see the annular solar eclipse, when the moon passes in front of the sun, blocking out all but an outer circle of light.

A Malaysian researcher known for finding new amphibian species said Friday his team had discovered at least one new species of frog in studies he said highlight Borneo's rich biodiversity.

Indraneil Das of the Universiti Malaysia Sarawak said the brown frog is just 4-5 centimeters (1.6-2.0 inches) long and makes a distinctive high-pitched chirp.

And the heat goes on. Forecasters predict toasty temperatures will stretch through the summer in the U.S. And that's a bad sign for wildfires in the West.

The forecast for June through August calls for warmer-than-normal weather for about three-quarters of the nation, the National Oceanic Atmospheric Administration said Thursday.

Scientists in the United States have enabled a paralyzed woman to lift a drink to her lips with a thought-controlled robotic arm, boosting hopes that tetraplegics may regain their independence.

On April 12 last year, 58-year-old Cathy Hutchinson made history by using only her thoughts to get a robotic arm to grasp a flask of coffee on a table, lift it and hold it to her lips for a sip, the researchers said.

Bright black-and-red butterflies that live on the fringes of the Amazonian rain forest have developed extraordinary techniques of gene-swapping to survive, scientists reported on Wednesday.

Different species of the Heliconius butterfly are sneakily cross-breeding in order to get superior wing colors, according to a comparison of their DNA codes.

The turtle is a closer relative of crocodiles and birds than of lizards and snakes, according to researchers who claim to have solved an age-old riddle in animal evolution.

The ancestry of the turtle, which evolved between 200 and 300 million years ago, has caused much scientific squabbling -- its physiology suggesting a different branch of the family tree than its genes do.

Scientists claimed Tuesday to have pinpointed the genes most responsible for schizophrenia in a breakthrough they say will allow better diagnosis and treatment of the debilitating mental illness.

In a study involving genetic information from thousands of schizophrenia patients as well as healthy controls, the researchers said they identified hundreds of genes that can show who is most at risk.

A mystery liver disease thought to be caused by introduced weeds is causing hairy-nosed wombats in southern Australia to go bald and die, researchers said Tuesday.

The illness, which causes the wombat to lose some or all of its fur and then starve to death, is tearing through South Australia's native southern hairy-nosed wombats, threatening entire populations.