(2)A spooky swing that moves on its own for days at a time has physics professors in Firmat, Argentina baffled. The researchers have ruled out wind, as well as magnetic and electrical fields. Could the playground be haunted? Watch the video(1) and decide for yourself.

1. http://www.thesun.co.uk/sol/homepage/news/article385529.ece
2. http://www.thesun.co.uk/sol/homepage/news/article385529.ece