3-D printed tissues may keep athletes in action

Bioscientists are moving closer to 3-D-printed artificial tissues to help heal bone and cartilage typically damaged in sports-related injuries to knees, ankles and elbows.

Cave of relics found under Mayan ruins of Chichen Itza (Update)

Archaeologists have discovered a cave filled with hundreds of artifacts beneath the ruins of the Mayan city of Chichen Itza in Mexico, the lead researcher on the project said Monday, calling the find "incredible."

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