News
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ArchaeologyHow Asia’s first nomadic empire broke the rules of imperial expansion
New studies reveal clues to how mobile rulers assembled a multiethnic empire of herders known as the Xiongnu more than 2,000 years ago.
By Bruce Bower -
Health & MedicineFour things to know about malaria cases in the United States
Five people have picked up malaria in the United States without traveling abroad. The risk of contracting the disease remains extremely low.
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AnimalsStatic electricity can pull ticks on to their hosts
Ticks brought near objects with a static charge frequently get pulled to those surfaces, a new study finds, suggesting one way the bugs find hosts.