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Unexplained Mysteries of 2013

Scientific investigations are all about the search for answers, but their conclusions can create more questions.

December 20, 2013
9:00 AM EST
| David A. Aguilar (CfA)
| Bailey et al./UA/MagAO
| Corbis
| Corbis
| Durham University
| Corbis
| Shmuel Marco
| Troy Alexander / Tambopata Research Center