The HEXAGON KH-9 reconnaissance satellites were the largest and last U.S. intelligence satellites to return photographic film ...

Our Earth is about 4.5 billion years old and, through careful work ... a professor of Earth and environmental sciences at the ...

Over time, Earth's surface renews itself in a process known as the rock cycle. Old or new, sedimentary or igneous, some of ...

This ancient ring system is thought to have formed about 466 million years ago, at the beginning of a period when Earth was regularly hit by meteorites, according to a new paper in the journal ... are ...

A mysterious vibration shook the planet last. The unusual rumble was neither an earthquake nor was it a volcanic eruption, as ...

Snooping in on satellites is getting to be quite popular, enough so that the number of people advancing the state of the art — not to mention the wealth of satellites transmitting signals in the ...

After this mixing, the Earth was still hot enough for separation to occur again and form new rock and metal layers - this is the ... The youngest mare are thought to be only 1.1 billion years old, ...

Harvard scientists have discovered a new tardigrade species in amber, offering insights into their evolutionary history and ...

New research gives insight into when ... "We did not expect LUCA to be so old, within just hundreds of millions of years of Earth formation," said co-author Sandra Álvarez-Carretero, a research ...

A new study offers the most detailed glimpse yet into how Earth's surface temperature has changed over the past 485 million years. The data show that Earth has been and can be warmer than today -- but ...

The fall equinox is a magical and enlightening moment when we honor the earth. We are given equal hours of day and night, ...