The'dead sun': Stunning Nasa video reveals barren solar surface with lowest level of activity since 2011 Footage from Nasa Solar Dynamics Observatory show nearly spotless sun The space agency says the sun hit its lowest activity level since 2011 Sun follows a pendulum-like 11-year cycle of activity, and peaked in 2014 While this is not unusual, some say trend could send us into'mini ice age' While this is not unusual, some say trend could send us into'mini ice age' Images captured by Nasa's Solar Dynamics Observatory from Nov 14-18 reveal just a handful of barely-visible spots on the surface of the sun, which is otherwise as blank as a cue ball Robots CAN'T fool humans (yet): It takes less than a second... The $189 smart mirror that can track your skin by taking a... Would you trust an AI to do your Christmas shopping? Robots CAN'T fool humans (yet): It takes less than a second... The $189 smart mirror that can track your skin by taking a... Would you trust an AI to do your Christmas shopping? The sun is in the currently in its quietest period for more than a century.