Ancient cities and cultures are a subject of fascination all over the world. Peru was home to a number of cultures in the ancient and medieval periods including the Inca Empire. Peru sees between 3 ...

For over two decades, physicists have been working toward implementing quantum light storage—also known as quantum memory—in ...

The luteal phase of the menstrual cycle happens right after ovulation. Learn more about symptoms, how long it lasts, and how ...

How did Earth, alone among the solar system's rocky planets, become the home for life? How, among all this frigid ...

Scientists have unearthed in Arizona fossils from an assemblage of animals, including North America's oldest-known flying reptile, that reveal a time of transition when venerable lineages that were ...

The underground cemeteries, nearly 2,000 years old, hold some of the earliest evidence of Christian faith, belief in the ...