New bathymetric map of the western Gulf of Alaska. New seafloor maps show for the first time the course of ancient ice masses. They show how they shaped essential habitat for the western Gulf of Alaska’s abundant fish, seabirds, and marine mammals. Scientists wove together historical and modern data—from century-old hand-drawn charts to modern multibeam surveys. They created […]
Homo sapiens, Neanderthals and other recent human relatives may have begun hunting large mammal species down to size — by way of extinction — at least 90,000 years earlier than previously thought, says a new study published in the journal Science. Elephant-dwarfing wooly mammoths, elephant-sized ground sloths and various saber-toothed cats highlighted the array of […]
For the first time, astronomers have detected a signal from stars emerging in the early universe. Using a radio antenna not much larger than a refrigerator, the researchers discovered that ancient suns were active within 180 million years of the Big Bang. The astronomers, from Arizona State University (ASU), the Massachusetts Institute of Technology (MIT) […]
Genetic analysis of ancient DNA from a 6-week-old infant found at an Interior Alaska archaeological site has revealed a previously unknown population of ancient people in North America. The findings, published in the Jan. 3 edition of the journal Nature, represent a major shift in scientists’ theories about how humans populated North America. The researchers have […]