Mexico's Chicxulub crater, a key to the creation of Universe Sharks swim around a platform off Mexico's east coast as scientists drill deep into the ocean floor, extracting the remains of the asteroid widely blamed for the demise of the dinosaurs. Some 30 meters (98 feet) above the ocean floor, the researchers pull out cylinders filled with rocks that could unlock the mysteries of life and death caused by the cataclysmic crash in the Gulf of Mexico some 66 million years ago. IMAGES AND SOUNDBITES