Lasers learn to accurately spot space junk

Chinese researchers have improved the accuracy in detecting space junk in earth's orbit, providing a more effective way to plot safe routes for spacecraft maneuvers.

Isotope analysis points to Mayan prisoners of war

Several years ago, Maya archaeologists from the University of Bonn found the bones of about 20 people at the bottom of a water reservoir in the former Maya city of Uxul, in what is now Mexico. They had apparently been killed ...

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