This was the first spacecraft to land on the moon's far side, often called its "dark side ... These endeavors have ...

New data reveals a 3-million-light-year filament connecting two galaxies, each of which hosts a supermassive black hole.

A new way of measuring structures deep inside Earth has highlighted numerous previously unknown blobs within our planet's mantle. These anomalies are surprisingly similar to sunken chunks of Earth ...

Scientists have known for decades that there are massive structures hidden deep within the Earth's mantle thanks to seismic shockwaves rippling through the Earth's interior. Large earthquakes ...