The page you are looking for is temporarily unavailable.
Please try again later

Technology Cracks on Mars Reveal a System of Ancient Lakes

13:30  21 april  2018
13:30  21 april  2018 Source:

Saltwater Lakes Hidden Beneath Glaciers May Mimic Moons

  Saltwater Lakes Hidden Beneath Glaciers May Mimic Moons There are about 400 subglacial lakes around the world, but these are the first scientists believe to be salty.There are plenty of lakes hidden below glaciers—about 400 around the world—but scientists believe most of them are freshwater, just like most lakes above the surface. That's what makes the two newly identified lakes so intriguing, according to a recent paper published in the journal Science Advances.

Cracks on Mar 's surface suggests that the red planet was once very wet. Credit: Google/NASA/JPL. A series of huge cracks etched across crater basins on Mars were caused by lakes that have since evaporated, a new study concludes.

New images from NASA's Curiosity rover on Mars reveal what looks to be the first sign of mud cracks on the Martian surface, providing scientists with even more evidence that the red planet once hosted water – which "The ancient lakes varied in depth and extent over time, and sometimes disappeared.

Mars once had ancient oceans. A photo of the Valles Marineris on Mars. © NASA/ARIZONA STATE UNIVERSITY VIA GETTY IMAGES Mars once had ancient oceans. A photo of the Valles Marineris on Mars. A study published Thursday confirmed that the cracks identified on Mars' surface last year by the Curiosity rover are indeed evidence of ancient lakes that likely dried up about 3.5 billion years ago. The new study provides further evidence of what the climate on the Red Planet may have been like in its ancient past.

The study, published online in Geology, proved that cracks on Mars' surface previously photographed by Curiosity are indeed desiccation mudcracks which could have only been formed when wet sediment was exposed to the air. This conclusion was based on an analysis of a single area of rock known as “Old Soaker.”

Mars' Moons May Have Formed From a Slow Collision

  Mars' Moons May Have Formed From a Slow Collision Once upon a time, they weren't alone.Load Error

Research team finds definitive evidence for ancient lake on Mars . Networks of giant polygonal troughs etched across crater basins on Mars have been identified as desiccation cracks caused by evaporating lakes , providing further evidence of a warmer, wetter martian past.

Ancient Mars Had Long-Lasting Lakes , Boosting Chances for Life. Space. Giant Cracks on Mars Hint at Ancient Lakes . Space. Possible Ancient Equator of Mars Revealed .

Researchers used the Curiosity rover and data from its many tools, particularly the Mars Hand Lens Imager, ChemCam Laser Induced Breakdown Spectrometer (LIBS) and the Alpha-Particle X-Ray Spectrometer (APXS) to study both the physical appearance and the chemistry of the rock, which is described as no bigger than a coffee table. 

The analysis revealed that cracks on the rocks were formed by exposure to air, rather than heat or the flow of water. In addition, the shape of the cracks suggests the occurrence of a single drying event on the planet, rather than multiple cycles of the planet getting wet and drying over. The position of the cracks, closer to the center of the ancient lake rather than along the edges, also suggests that the lake levels changed often, rising and falling dramatically over time.

Mysterious shipwreck discovered in Great Lakes believed to be nearly 200 years old

  Mysterious shipwreck discovered in Great Lakes believed to be nearly 200 years old Experts are planning to investigate a mysterious Great Lakes shipwreck that they say may be the oldest in Lake Erie and might be nearly 200 years old. The National Museum of the Great Lakes wants to identify the shipwreck, which archaeologists believe is the Lake Serpent, a schooner that sank in 1829.The shipwreck site was discovered by Cleveland Underwater Explorers (CLUE) in 2015. “Since then we have narrowed the possibilities from over 200 shipwrecks to 3,” explained the Museum, in a statement released Monday.

Ancient fresh water lake on Mars could have sustained life, Curiosity researchers show. December 9, 2013. Gale before Curiosity: What we knew and what the rover may reveal . September 26, 2012.

Some Ancient Mars Lakes Formed Long After Others. The recently discovered lakes and streams appeared roughly a billion years after read more. Studying Meteorites May Reveal Mars ' Secrets of Life.

"The mudcracks are exciting because they add context to our understanding of this ancient lacustrine system," lead study author Nathaniel Stein, a geologist at the California Institute of Technology in Pasadena, said in a statement, referring to the ancient lake system on the planet. 

Scientists have known of the existence of ancient water on Mars for years. A 2015 NASA study that measured water signatures in Mars’ atmosphere suggested that ancient oceans may once have had more water than our own Arctic Ocean. However, because the planet has less gravity and a thinner atmosphere than Earth, this water evaporated into space over the course of several billion years.

Water still exists on Mars in the form of ice. In 2015, NASA scientists found a slab of ice just beneath Mars' surface that was estimated to be as big as California and Texas combined.

Some have even suggested that there may still be liquid water flowing on Mars. In 2015 NASA announced that dark features that appeared to be running down slopes on Mars were running water. However, more recent research suggests that these darker slopes are just sand.

Did another advanced species exist on Earth before humans? .
New paper explains how we might go about looking for evidence of earlier civilizations.Our Milky Way galaxy contains tens of billions of potentially habitable planets, but we have no idea whether we're alone. For now Earth is the only world known to harbor life, and among all the living things on our planet we assume Homo sapiens is the only species ever to have developed advanced technology.

—   Share news in the SOC. Networks

Topical videos:

This is interesting!