Strong earthquake along coast of central Chile. Same approximate region as much more powerful quake, two months ago. No tsunami warning. No immediate reports of damage or injuries.
A study suggests that, by the late 21st century, temperatures in the Persian Gulf might routinely edge above a tipping point for human survival. Wealthy areas might be able to adapt, poorer areas less able, the authors say.
Last week heralded as largest known asteroid to pass Earth until 2027. Swept within 1.3 times the moon's distance on October 31. Now thought to be a comet!
Evidence that Earth was hit by two solar storms - 10 times larger than those observed recently - 1,000 years ago. If they occurred today, they'd have devastating effects on power supplies, satellites and communications.