A ship carrying 25 tons of radioactive waste arrived back in Australia on Saturday, met by activists who warned against the vast nation becoming a nuclear dumping ground.

About a dozen Greenpeace protesters, some carrying signs such as "Don't waste Australia", stood near the entrance to Port Kembla south of Sydney as the BBC Shanghai arrived in a well-policed operation.

British astronaut Tim Peake on Friday said he will be taking part in the London marathon -- harnessed to a running machine 400 kilometers above Earth on the International Space Station.

"As soon as I got assigned to my mission to the International Space Station, I thought wouldn’t it be great to run," said Peake, a former helicopter pilot who will be running for the Prince's Trust charity.

The European Space Agency (ESA) on Thursday said it had launched a prototype lab to test a key part of Albert Einstein's theory of relativity, published almost exactly a century ago.

A Vega light rocket lifted off from the ESA's space base in Kourou, French Guiana, carrying a "technology demonstrator" called LISA Pathfinder into orbit, it said.

Beijing ordered hundreds of factories to shut and allowed children to skip school as choking smog reached over 25 times safe levels on Tuesday, casting a cloud over China's participation in Paris climate talks.

A thick grey haze shrouded the capital with concentrations of PM 2.5, harmful microscopic particles that penetrate deep into the lungs, as high as 634 micrograms per cubic metre.

The Chinese scientist behind the world's biggest cloning factory has technology advanced enough to replicate humans, he told Agence France Presse, and is only holding off for fear of the public reaction.

Boyalife Group and its partners are building the giant plant in the northern Chinese port of Tianjin, where it is due to go into production within the next seven months and aims for an output of one million cloned cows a year by 2020.

Japan will resume "research" whaling in the Antarctic by the end of March next year, local media reported Saturday, despite a call by global regulators for more evidence that the expeditions have a scientific purpose.

The move came after a one-season suspension of its hunting in the ocean as the United Nations' top legal body judged last year that Japan's whaling there was a fig leaf for a commercial hunt.

In a martial artist's white silk pajamas, a man practiced tai-chi in harmony with a motorized arm at a Beijing exhibition showcasing a vision of robots with Chinese characteristics.

Vehicles with automated gun turrets sat alongside drink-serving karaoke machines at the World Robot Conference, as manufacturers sought new buyers for their "jiqiren" -- "machine people" in Chinese.

Forty minutes east of South Africa's capital Pretoria, amid the lowing of thousands of cows and the strong stink of dung, a small factory has taken on the challenge of turning manure into energy.

"Every day, 120 tonnes of manure and 66 tonnes of recycled paper are mixed in one of these tanks," Bio2Watt project manager Steven Roux said in the shadow of a looming 9,000 cubic meter vat.

The minuscule but nearly indestructible tardigrade gets a huge chunk of its genome from the DNA of foreign organisms, which scientists say may hold the key to its survival.

Also known as water bears, or moss piglets due to their morphology, these micro animals live all across the world.

A northern white rhinoceros -- one of just four remaining worldwide -- died Sunday at the San Diego Zoo, officials said.

The 41-year-old female known as Nola saw her health take a quick turn for the worse.