Opinion
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The brain of former NFL star Junior Seau, who committed suicide last year, showed signs of the kind of neurodegenerative disease associated with repetitive head trauma. Elsa/Getty Images hide caption
Wednesday
Big science in orbit: the Hubble Space Telescope NASA hide caption
Baltimore Ravens linebacker Ray Lewis speaks at a news conference in New Orleans on Monday. The Ravens face the San Francisco 49ers in Super Bowl XLVII on Sunday. It will be Lewis' last game. Patrick Semansky/AP hide caption
Tuesday
Where does the mind fit within the cosmos? Are they separate, intertwined or one and the same? F. Comeron/ESO hide caption
Monday
Echolocation is second nature to animals such as bats and dolphins. Can humans also find their way using sound as a tool? Ian Waldie/Getty Images hide caption