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Tag: ancient

Geologists locate source of chemical signature in ancient volcanic rocks

Geologists locate source of chemical signature in ancient volcanic rocks

Science
Oct. 28 (UPI) -- Geologists have linked ancient volcanic activity with a unique geochemical signature measured in rock samples recovered from the coast of Greece. According to a new study published this week in the journal Nature Geoscience, an ancient ring of explosive arc volcanoes, which erupted some 45 million years ago, accounts for the highly oxidized rocks found along the coast of Greece. Researchers hypothesized that fluids from subducted oceanic rocks can explain the oxidation found in rocks formed by the arc volcanoes. To test their hypothesis, scientists went looking for the fluid source's geochemical signature in ancient subducted oceanic crust located on the Greek island of Sifnos. Oxidizing fluids influence the iron isotope composition found large garnet crystals, and becau...
Ancient microbes are living inside Europe’s deepest meteorite crater

Ancient microbes are living inside Europe’s deepest meteorite crater

Science
Oct. 18 (UPI) -- Rock cores collected from deep beneath the planet's surface suggest ancient microbes have been living inside Europe's largest meteorite crater for millions of years. Some 400 million years ago, a massive space rock slammed into northern Europe, excavating a giant crater in the middle of what's now Sweden. Today, prospectors are drilling for natural gas within the confines of the ancient crater, the contours of which are called the Siljan Ring. The drilling attempts have yielded fresh rock cores, several of which made their way to geochemistry labs at Linnaeus University in Sweden. When scientists at Linnaeus investigated the rocks, they found evidence of long-term deep microbial activity. "We examined the intensively fractured rock at significant depth in the crater and...
Astronomers find dozens of massive, ancient galaxies

Astronomers find dozens of massive, ancient galaxies

Science
Aug. 7 (UPI) -- Astronomers have discovered an abundance of vast, ancient galaxies. Scientists spotted the galaxies in the distant universe using the combined power of several space observatories. The discovery, published Wednesday in the journal Nature, could force cosmologists to change their models of the universe. Most models don't predict such an abundance of massive galaxies so early in the evolution of the universe. "This is the first time that such a large population of massive galaxies was confirmed during the first 2 billion years of the 13.7-billion-year life of the universe. These were previously invisible to us," Tao Wang, researcher at the University of Tokyo, said in a news release. "This finding contravenes current models for that period of cosmic evolution and will help ...
U.S. envoy attend opening of ancient East Jerusalem road amid opposition

U.S. envoy attend opening of ancient East Jerusalem road amid opposition

World
June 30 (UPI) -- U.S. Ambassador David Friedman and U.S. Middle East special envoy Jason Greenblatt attended the inauguration of an archaeological site in Jerusalem on Sunday. Friedman and Greenblatt hammered through the final wall in front of Pilgrimage Road at the City of David National Park, underneath Palestinian homes in East Jerusalem in the ceremonial event that angered Palestinians and Israeli non-governmental organizations. Archeologists had spent the past eight years excavating the area that is believed to have served as a pathway for Jews traveling to Temple Mount. "The City of David brings biblical Jerusalem back to life," Friedman said. "It enables every one of us to stroll the corridors where the ancient prophets of Israel gave voice to revolutionary ideals of freedom, libe...
DNA analysis offers insight into Japan’s ancient population boom, bust

DNA analysis offers insight into Japan’s ancient population boom, bust

Science
June 20 (UPI) -- Scientists have gained new insights into the history of Japan's early residents by analyzing the Y chromosomes of modern Japanese men. The analysis allowed researchers to estimate the ancient human population living on Japan's main island some 2,500 years ago. "Evidence at archaeological dig sites has been used to estimate the size of ancient human populations, but the difficulty and unpredictability of finding those sites is a big limitation," Jun Ohashi, an associate professor of human evolutionary genetics at the University of Tokyo, said in a news release. "Now we have a method that uses a large amount of modern data." Researchers estimate Japan was occupied by the Jomon people prior to 500 B.C. Around 2,500 years ago, they were joined by Yayoi people. The Yayoi migr...