Skulls and other human remains from P.W. Lund’s Collection from Lagoa Santa, Brazil. Kept in the Natural History Museum of Denmark. (Credit: Natural History Museum of Denmark)
A new report finds people spread through the Americas in multiple independent, relatively quick migrations. The discovery contrasts the notion that the peopling of the continents took the form of a slow expansion from the northern regions of modern day Alaska into South America as populations grew.
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Photo of the cranium of Burial 32 at the archaeological site of Lapa do Santo. DNA for the study was extracted from this individual. (Credit: Maurício de Paiva)
When the Americas were first settled, sometime in the past 25,000 years, it happened from the top down. Eurasians made their way across the Beringian land bridge (or followed the coastline, what’s known as the Kelp Highway hypothesis) from Siberia to Alaska and spread throughout their new territory.
Once they were her ...read more
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It turns out that the sun’s magnetic field can shape and push the dust of a comet’s tail, according to a revelation made possible by one young scientist’s innovative new image-processing technique.
Comet Dust
In 2007, scientists were elated when NASA’s STEREO spacecraft laid its “eyes” on Comet C/2006 P1, also known as Comet McNaught — named after astronomer Robert McNaught, who discovered the comet a year prior. Comet McNaught, which ...read more
The newfound star is not only one of the oldest stars in the universe, but also one of the most metal-poor stars known. An artist’s concept of a small red dwarf star is shown above. (Credit:NASA/Walt Feimer)
One of the oldest stars in the universe is quietly hiding out in the Milky Way some 2,000 light-years from Earth.
According to a new study published in The Astrophysical Journal, the tiny, 13.5-billion-year-old red dwarf contains barely any heavy elements at all, suggesting it formed ...read more
Author Vishay SinghPosted on Categories Discover Magazine
