It's long been thought our species was unique in its ability to adapt to harsh climates like bone-dry deserts or thick-set ...

The youngest and most metal-rich stars, such as the Sun, are called Population I. Older stars with fewer metals are ...

For generations, Gatorade and similar electrolyte beverages have been helpful tools for athletes seeking a competitive edge.

Twins occur when two separate eggs are fertilized at the same time, or when a fertilized eggs splits into two. Multiple ...

Have you looked at the international rankings of the world's happiest countries lately? Measuring a country's subjective levels of happiness has become something of an international sport.