Earth's worst mass extinction in history - when around 90 per cent of all life was wiped out - may one day repeat itself, scientists have warned. The Permian-Triassic catastrophe occurred 250 million years ago when rapidly rising levels of carbon dioxide and methane triggered runaway global warming, according to new research.
Science & Technology
Instagram, the photo-sharing application owned by Facebook Inc., will soon let people book appointments with businesses, part of an effort to expand the app's consumer uses. People will be able to set up a haircut, for example, by going to a salon's Instagram profile and clicking on a button to schedule it. The move could challenge companies like Priceline Group Inc.'s OpenTable and Yelp Inc.