Tag Archives: valley networks

How water could flow on icy early Mars

Research by planetary scientists at Brown University finds that periodic melting of ice sheets on a cold early Mars would have created enough water to carve the ancient valleys and lakebeds seen on the planet today. For scientists trying to … Continue reading

Posted in Reports | Tagged , , , | Comments Off

HRSC: Tributes to wetter times on Mars

A dried-out river valley with numerous tributaries is seen in this recent view of the Red Planet captured by ESA’s Mars Express. This section of the Libya Montes region, which sits on the equator at the boundary of the southern … Continue reading

Posted in Reports | Tagged , , , , , , , , , | Comments Off

Impact-heated rock led to relatively recent water-carved valleys on Mars

New research shows that water from melted snow and ice likely carved valley networks around Lyot crater on Mars. Present-day Mars is a frozen desert, colder and more arid than Antarctica, and scientists are fairly sure it’s been that way … Continue reading

Posted in Reports | Tagged , , , | Comments Off

HRSC: Window to a watery past

This 70 km-wide crater and its surrounds offer a window into the watery past of the Red Planet. The scene, captured by ESA’s Mars Express, is a composite of two images taken in March 2007 and February 2017. It focuses … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , , , | Comments Off

Valley networks point to much wetter past

A new study led by Northern Illinois University geography professor Wei Luo calculates the amount of water needed to carve the ancient network of valleys on Mars and concludes the Red Planet’s surface was once much more watery than previously … Continue reading

Posted in Reports | Tagged , , , | Comments Off

How hard did it rain on Mars?

Heavy rain on Mars reshaped the planet’s impact craters and carved out river-like channels in its surface billions of years ago, according to a new study published in Icarus. In the paper, researchers from the Smithsonian Institution and the Johns … Continue reading

Posted in Reports | Tagged , , , | Comments Off

THEMIS: Branching channels of Arda Valles

THEMIS Image of the Day, December 29, 2016. Today’s false color image shows some of the many channels that make up Arda Valles. Their shape and meandering courses suggest that they were eroded by flowing streams or rivers. The THEMIS … Continue reading

Posted in Reports | Tagged , , , , , , , , , , , | Comments Off

THEMIS: Channels in Arda Valles

THEMIS Image of the Day, December 15, 2016. The numerous, closely spaced channels in this VIS image are part of Arda Valles. Such valley networks point to flowing streams and rivers in the distant martian past. More THEMIS Images of … Continue reading

Posted in Reports | Tagged , , , , , , , , , | Comments Off

Fossil rivers suggest warm, wet ancient Mars

Extensive systems of fossilised riverbeds have been discovered on an ancient region of the Martian surface, supporting the idea that the now cold and dry Red Planet had a warm and wet climate about 4 billion years ago, according to … Continue reading

Posted in Reports | Tagged , , , | Comments Off

HiRISE: Valley networks in the ancient highlands

The valley networks on Mars are terrains eroded by flowing water billions of years ago. In places where the bedrock is well exposed, we often see a variety of colors due to altered minerals and polygonal patterns perhaps due to … Continue reading

Posted in Reports | Tagged , , , , , , , | Comments Off