— #25: Ancient hominid species famous for their 'upright' posture — 11 across ...

Long before Western astrology, the Chinese zodiac helped organize years, beliefs, and social life. Here’s how the system of 12 animals evolved over the centuries.

Astronomers have long sought evidence to explain why comets at the outskirts of our own solar system contain crystalline ...

Complex sugar-protein molecules that sense external messages to help a cell grow or respond to its environment can now be ...

After the Big Bang, the Universe entered a long, dark period before the first stars formed. During this era, hydrogen emitted a faint radio signal that still echoes today. New simulations show this ...