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Unprecedented Wave of Large-Mammal Extinctions Linked to Ancient Humans

Unprecedented Wave of Large-Mammal Extinctions Linked to Ancient Humans

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…

New Study Shows What Interstellar Visitor ‘Oumuamua Can Teach Us

New Study Shows What Interstellar Visitor ‘Oumuamua Can Teach Us

The first interstellar object ever seen in our solar system, named ‘Oumuamua, is giving scientists a fresh perspective on the development of planetary systems. A new study by a team including astrophysicists at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, calculated how this visitor from outside our…

Collective Movement Studies May Enhance Salmon Management

Collective Movement Studies May Enhance Salmon Management

New research involving a University of Alaska Fairbanks scientist suggests that social behavior of salmon and other fish is an important puzzle piece that has been missing from fisheries conservation. Collective movement, which is the study of why and how animals move in groups, can explain many aspects…

A Star Disturbed the Comets of the Solar System in Prehistory

A Star Disturbed the Comets of the Solar System in Prehistory

About 70,000 years ago, when the human species was already on Earth, a small reddish star approached our…

Scientists Detect Radio Echoes of a Black Hole Feeding on a Star

Scientists Detect Radio Echoes of a Black Hole Feeding on a Star

On Nov. 11, 2014, a global network of telescopes picked up signals from 300 million light years away…

Alaskans Try to Combat Death by Marine Toxins

Alaskans Try to Combat Death by Marine Toxins

Mass mortality of seabirds. Marine mammal deaths. Alaskans sickened by shellfish. What’s the common theme? Seawater contaminated by…

Astronomers Detect Ancient Signal from First Stars in Universe

Astronomers Detect Ancient Signal from First Stars in Universe

For the first time, astronomers have detected a signal from stars emerging in the early universe. Using a…

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