Archaeology
- 			 Archaeology ArchaeologyAncient South American populations dipped due to an erratic climateScientists link bouts of intense rainfall and drought around 8,600 to 6,000 years ago to declining numbers of South American hunter-gatherers. By Bruce Bower
- 			 Archaeology ArchaeologyAn ancient pouch reveals the hallucinogen stash of an Andes shamanSouth American shamans in the Andes Mountains carried mind-altering ingredients 1,000 years ago, a study finds. By Bruce Bower
- 			 Archaeology ArchaeologyExcavations show hunter-gatherers lived in the Amazon more than 10,000 years agoEarly foragers may have laid the foundation for farming’s ascent in South America’s tropical forests. By Bruce Bower
- 			 Archaeology ArchaeologyAncient sculptors made magnetic figures from rocks struck by lightningCarved ‘potbelly’ stone sculptures suggest people in what’s now Guatemala knew about magnetism more than 2,000 years ago. By Bruce Bower
- 			 Archaeology ArchaeologyNewly translated Cherokee cave writings reveal sacred messagesCherokee inscriptions highlight the tribe’s rituals nearly 200 years ago in what’s now a tourist cave in Alabama. By Bruce Bower
- 			 Archaeology Archaeology‘Cities’ reveals common ground between ancient and modern urban lifeIn the book ‘Cities,’ archaeologist Monica Smith sees the positives in past and present metropolises. By Bruce Bower
- 			 Archaeology ArchaeologyThe oldest known astrolabe was used on one of Vasco da Gama’s shipsA navigational device for taking altitudes at sea was found in a Portuguese shipwreck in the Arabian Sea and dates back to 1496. By Bruce Bower
- 			 Archaeology ArchaeologyA 2,000-year-old tattoo tool is the oldest in western North AmericaThe artifact is made of two pigment-stained cactus spines, and has been sitting in storage since its discovery in 1972. By Bruce Bower
- 			 Archaeology ArchaeologyAncient Angkor’s mysterious decline may have been slow, not suddenAnalyzing sediment from the massive city’s moat challenges the idea that the last capital of the Khmer Empire collapsed suddenly. By Bruce Bower
- 			 Archaeology ArchaeologyTooth plaque shows drinking milk goes back 3,000 years in MongoliaThe hardened plaque on teeth is helping scientists trace the history of dairying in Mongolia. 
- 			 Archaeology ArchaeologyThe spread of Europe’s giant stone monuments may trace back to one regionMegaliths spread across the continent due to seafarers’ influence, researcher says. By Bruce Bower
- 			 Genetics GeneticsDNA reveals early mating between Asian herders and European farmersA new genetic analysis could upend assumptions about the origins of Indo-European languages. By Bruce Bower