NEW YORK: Astronomers have discovered the largest known structure in the universe - a group of quasars so large it would take 4 billion years to cross it while traveling at speed of light.

The immense scale also challenges Albert Einstein's Cosmological Principle, the assumption that the universe looks the same from every point of view, researchers said.

The findings by academics from Britain's University of Central Lancashire were published in the journal Monthly Notices of the Royal Astronomical Society and reported on the society's website on Friday.

SAN FRANCISCO/BEIJING: In a revised version of an interview published Thursday in a Chinese newspaper, Apple Inc marketing chief Phil Schiller said the company would focus on making "the best products" for customers and "never blindly pursue market share".

LONDON: A helicopter crashed into a crane on top of one of Europe's tallest residential blocks on Wednesday, killing two people as it burst into flames and spiraled down into rush-hour traffic close to the Houses of Parliament in central London.