In the natural world—where predators pounce, prey flee, and group members feed and sleep in solidarity—animal behavior is ...

In this paper we discuss the challenges for international macroeconomics that these developments pose and characterize stylized facts associated with the structure of external liabilities in ...

Smithsonian researchers trekked to a remote site in northern Canada to collect four-billion-year-old rock samples that could ...

A fresh look at data from NASA's Magellan mission has revealed potentially ground-shaking insights into mysterious structures ...

The Midcontinent Rift is a giant tear that formed in what is now the U.S. Midwest 1.1 billion years ago. Nicknamed North ...

A glass bead retrieved by China's Chang'e-5 lunar mission is offering a glimpse into the moon's hidden interior and violent past. Witness live views of Earth from the International Space Station as it ...