FRANCE: Physicists said Tuesday they have fine-tuned an atomic clock to the point where it won't lose or gain a second in 15 billion years -- longer than the universe has existed.
The "optical lattice" clock, which uses strontium atoms, is now three times more accurate than a year ago when it set the previous world record, its developers reported in the journal Nature Communications.
The advance brings science a step closer to replacing the current gold standard in timekeeping: the caesium fountain clock that is used to set Coordinated Universal Time (UTC), the official world time.
CHILE: Volcano Calbuco in southern Chile has erupted for the first time in more than five decades on Wednesday, sending a thick plume of ash and smoke nearly 20 kilometres into the sky.
Chile's Onemi emergency office declared a red alert following the sudden eruption at around 6pm local time, about 1000 kilometres south of Santiago, the capital, near the tourist town of Puerto Varas.
As night fell, about 4000 people had so far moved out of the area, an evacuation radius of 20 kilometres has been established and classes have been cancelled in surrounding towns, authorities said.