Mexican engineer Gabriel Luna-Sandoval was urinating one day when he realized that the yellow liquid could be of "vital" use elsewhere.

Nine years later, he invented a machine that he said can transform urine into a biogas to serve as a household heater to take hot showers or cook.

It was a startling scientific finding: Children who eat candy tend to weigh less than those who don't.

Less startling was how it came about. The paper was funded by a trade association representing the makers of Butterfingers, Hershey and Skittles. And its findings were touted by the group even though one of its authors didn't seem to think much of it.

The US government, in a first, is preparing to approve a private commercial space mission beyond the Earth's orbit, the Wall Street Journal has reported.

Europe's trailblazing spacecraft Rosetta has resumed its exploration of a comet hurtling through the Solar System after a "dramatic weekend" in which contact with Earth was lost for nearly 24 hours, mission control said Thursday.

Hugh Herr, an MIT professor who has devoted his life to creating bionic limbs since he had both his legs amputated after a climbing accident, was awarded Spain's top science prize Wednesday.

Falling energy costs, including from the rise of renewables, are making the controversial expansion of Hungary's sole nuclear plant with Russian reactors less viable, one of the country's energy chiefs said Monday.

"Due to the development of renewable resources, we can see clearly that the price of energy will fall in the future," said the chief executive of Hungary's national electricity company MVM, Peter Csiba, in an interview in the leading Hungarian daily Nepszabadsag.

SpaceX launched an Asian communications satellite into a distant orbit Friday and for the fourth time managed to recover the rocket that did the work.

Thirteen species of Indonesian birds, including the country's symbolic Javan Hawk-eagle, are at serious risk of extinction mainly due to the pet trade, a wildlife watchdog warned Wednesday.

The vast Indonesian archipelago is home to a dizzying array of birds and keeping them as pets has long been part of the national culture, with birdcages a common sight outside homes and shops across the country.

U.S. biochemical engineer Frances Arnold on Tuesday won a million-euro technology prize in Finland for her work on "directed evolution", a method of rewriting DNA to improve medicines and develop green fuels.

"Frances Arnold receives the 2016 Millennium Technology Prize in recognition of her discoveries that launched the field of 'directed evolution', which mimics natural evolution to create new and better proteins in the laboratory," the Technology Academy Finland, which awards the prize at two-year intervals, said in a statement.

India successfully launched its first model space shuttle on Monday, a top official said, as New Delhi joined the race to develop a reusable rocket to make space travel easier and cheaper.

The winged shuttle blasted off on a rocket from the southeastern spaceport of Sriharikota at about 7:00am (0130 GMT), with television footage showing it streaming through a clear sky.