One of the world's rarest flowers has been stolen, Britain's Kew Gardens announced this week. The water lily Nymphaea thermarum is seen here in 2010. Andrew McRobb/AP hide caption

itoggle caption Andrew McRobb/AP

Eugen Darie has admitted to being part of a Romanian gang that stole seven works by masters including Pablo Picasso and Henri Matisse from a Rotterdam museum last October. Vadim Ghirda/AP hide caption

itoggle caption Vadim Ghirda/AP

When researchers at Weill Cornell Medical College scanned teenage brains, they found that the area that regulates emotional responses has to work harder to keep impulses in check. Courtesty Kristina Caudle/Developmental Neuroscience hide caption

itoggle caption Courtesty Kristina Caudle/Developmental Neuroscience