Stone Towers Are Decoded as Earliest Solar Observatory in the Americas
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Peruvians 2,300 years ago tracked the movement of the sun using a line of elaborate stone towers erected on a low ridge.
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A proposed solar telescope could help scientists gain a clearer picture of the link between sunspots and solar storms, which can spur power outages on Earth.
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U.S. and Puerto Rican archaeologists say they have found the best-preserved pre-Columbian site in the Caribbean, which could shed light on virtually every aspect of Indian life in the region, from sacred rituals to eating habits.
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Locked away in fossils is evidence of a sudden solar cooling. Kate Ravilious meets the experts who say it could explain a 3,000-year-old mass migration - and today&#39;s global warming.
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A puzzling site grew more curious with the release of a satellite photograph showing new construction there that resembles the siteâs former main building.
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NASA's twin Solar Terrestrial Relations Observatories (STEREO) sent back their first images of the sun this week and with them a view into the sun's mounting activity.One image shows the first coronal mass ejection (CME) observed by STEREO's Ahead spacecraft, taken Dec. 9.
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DNA extracted from an ancient human skeleton found in Alaska suggests that the New World was first settled by prehistoric seafarers 15,000 years ago.
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Years in the planning, one of the world's most powerful telescopes sees its first light over the weekend. It should be fully operational by next May.
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A new solar cycle is under way. The National Oceanic and Atmospheric Administration said Friday that the first sunspot of a new 11-year cycle has appeared in the sun's northern hemisphere.
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The stones were likely heated in a fire and quickly doused in cold water, cracking before being placed along the serpentine earthen mound. The result: a curving paved structure possibly used in a ritual by Britain's Bronze Age inhabitants.
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By TIM PAYNE  ST. JOHN'S, Antigua - A land-clearing project in southern Antigua is threatening a unique ancient settlement where Arawak Indians lived from roughly 500 B.C. until the arrival of Christopher Columbus, an archaeologist said Monday.
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A prehistoric settlement discovered in England likely housed the builders of the famous stone monument and was an important ceremonial site in its own right, archaeologists say.
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Scientists have pieced together how a 2,000-year-old astronomical calculator was built, revealing an astounding level of craftsmanship for its time.
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In the growing debate about when people first appeared on this continent, a leading archaeologist said Wednesday he has discovered what could be sooty evidence of human occupation in North America tens of thousands of years earlier than is commonly believed.
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The first solar-wind samples recovered from the crashed Genesis space capsule will be examined by researchers in California. The Genesis crashed earlier this month into Utah&#39;s west desert.
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Scientists from the US reconstruct a 40,000-year record of climate change at the South Pole.
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Astronomers believe they've picked up light generated 13 billion years ago by some of the first stars in the universe.