<i>The Mercury Spider</i>

This Nasa handout photo shows Louise Prockter, instrument scientist for the Mercury Dual Imaging System, John Hopkins University Applied Physics Laboratory, discusses the "The Spider" image, seen in the background, during a press conference at Nasa Headquarters, in Washington,DC on January 30. The "Spider" image shows the floor of the Caloris basin on Mercury and was obtained by the Nasa Messenger spacecraft. PHOTO: AFP/NASA