Surprised Russian school kids discover Arctic island has vanished after comparing satellite images 

 The cryovolcanic "centaur" comet 29P/Schwassmann-Wachmann has erupted four times in less than 48 hours, becoming unusually bright in the process. It is the most powerful outburst from the city-size oddball in more than three years.  

https://cdn.mos.cms.futurecdn.net/XKzw2BghDVjswvJqawGtt5.jpg

https://www.space.com/the-universe/climate-change/surprised-russian-school-kids-discover-arctic-island-has-vanished-after-comparing-satellite-images