To put that in perspective, the Earth is thought to be about 4.5 billion years old, which means these "rocks"—really ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long ...

Earth's northern hemisphere warms up literally for the astronomical start to spring. Here's what to know about the season.

thus transforming Earth-based life detection research. Based on this new evidence, planetary systems had the potential to emerge before many of the first galaxies formed. The availability of water at ...

Primordial helium from the beginning of the solar system may be stuck inside Earth's solid core, new research suggests. The findings could have implications for a long-standing debate about how ...