More than 10,000 fish died in temporary holding tanks in Brazil during construction of what is being touted as the world's largest freshwater aquarium, local media reported.

Prosecutors in Campo Grande, the capital of Mato Grosso do Sul state, are probing who is at fault after the local government and the company that dealt with the fish blamed each other.

The sun-powered Solar Impulse 2 aircraft has been grounded in Hawaii, its crew said Saturday, after a grueling five-day, fuel-less flight across the Pacific Ocean overheated its batteries.

The airplane took 118 hours to cross from Japan to Hawaii in the most perilous leg of its goal to circumnavigate the globe without a drop of fuel. 

To the untrained eye, it's just a lot of birds on an otherwise deserted stretch of muddy, flat coastline. But for ornithologists, North Korea's west coast is a little piece of paradise each spring — and both the birds and a dedicated group of birdwatchers travel a long way to get there.

While North Korea is wary of letting foreigners inside its borders, a recent trip by a New Zealand research team to the mudflats near Nampo, southwest of the capital, Pyongyang, underscores some tentative but significant progress by outside scientists to conduct small-scale research projects — as long as they don't rub up against sensitive topics and are seen as useful to North Korea itself.

Giant pandas are the new couch potatoes of the animal world, according to a study Thursday that found the bears are just as sluggish as slow-moving sloths.

Researchers in China tracked five captive pandas and three wild ones for the study published in the journal Science.

The governor of California has likened the state of the planet to the Titanic in an attempt to drive home his growing fears about climate change.

"A lot of people are asleep, they are on the Titanic and they drink champagne, while we are about to crash," Jerry Brown, whose state is struggling to cope with a historic drought that many blame on climate change, told the Climate Summit of the Americas.

June rainfall has helped alleviate what North Korea has described as its worst drought for a century, although key rice-producing areas remain badly affected, the South Korean government said Friday.

"It seems that ... the situation has considerably eased," Unification Ministry spokesman Jeong Joon-Hee told reporters.

Omega-3 fish oils can be grown in fields using genetically modified oilseed crops, British researchers said as they released trial results this week.

The discovery could, subject to further research, eventually mean the creation of a more sustainable supply of fish oil for fish farms, which need them to nurture their produce.

A Boston science museum that praised a teenager for catching a mistake in the golden ratio at a decades-old exhibit now says it wasn't an error after all.

The Museum of Science released a statement Tuesday afternoon saying the equation in the 34-year-old "Mathematica exhibit" with minus signs instead of plus signs is actually the "less common — but no less accurate — way to present it."

A newly named dinosaur whose head frill was adorned with curly horns has joined the ranks of the legendary family that includes the Triceratops, paleontologists said Wednesday.

The lumbering creature is named Wendiceratops pinhornensis, after the fossil hunter Wendy Sloboda, who first discovered the trove of some 200 bones in southern Alberta, Canada, said the study in the journal PLOS ONE.

Atronomers who trained their telescopes on a strange stellar blip were rewarded with a front-row seat to the spectacle of a black hole waking up to devour breakfast.

The black hole at the center of a galaxy 42 million light years away, in the constellation of Pisces, may have been dormant for millions of years, a team reported Thursday.