Archaeologists Find 18th Century Log Road In Annapolis, Maryland, US
00:45 05-05-2008; source: www.sciencedaily.com
Archaeologists have uncovered traces of a very early log road deep under an Annapolis street -- the first ever found in the city and perhaps one of the oldest such finds in the Washington, D.C. area. The discovery comes in the midst of Annapolis' 300th anniversary.
Early Human Populations Evolved Separately For 100,000 Years
00:45 05-05-2008; source: www.sciencedaily.com
Over 600 complete mtDNA genomes from indigenous populations across the continent were analyzed and the data provided surprising insights into the early demographic history of human populations before they moved out of Africa. The extensive data analysis revealed that early human populations were small and isolated from each other for many tens of thousands of years.
Molecular Analysis Confirms Tyrannosaurus Rex's Evolutionary Link To Birds
00:45 05-05-2008; source: www.sciencedaily.com
Putting more meat on the theory that dinosaurs' closest living relatives are modern-day birds, molecular analysis of a shred of 68-million-year-old Tyrannosaurus rex protein -- along with that of 21 modern species -- confirms that dinosaurs share common ancestry with chickens, ostriches, and to a lesser extent, alligators.
Freshwater Herring Had Salty Origin
00:45 05-05-2008; source: www.sciencedaily.com
East Africa's Lake Tanganyika has a highly diverse fauna which closely resembles marine animals. A researcher has traced the origins of the Lake's freshwater herring to a marine invasion which occurred in West Africa 25 to 50 million years ago. The ancient freshwater capture of marine organisms may help to explain the origins of other species unique to this Lake.
Volcanic Eruption Of 1600 Caused Global Disruption
00:45 05-05-2008; source: www.sciencedaily.com
The 1600 eruption of Huaynaputina in Peru had a global impact on human society, according to geologists. The eruption is known to have put a large amount of sulfur into the atmosphere, and tree ring studies show that 1601 was a cold year, but no one had looked at the agricultural and social impacts.
Sierra Nevada Rose To Current Height Earlier Than Thought, Say Geologists
00:45 05-05-2008; source: www.sciencedaily.com
Geologists studying deposits of volcanic glass in the western United States have found that the central Sierra Nevada largely attained its present elevation 12 million years ago, roughly 8 or 9 million years earlier than commonly thought. The finding has implications not only for understanding the geologic history of the mountain range, but for modeling ancient global climates.
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