عربي English Türkçe اردو فارسى
Logo
Latest News
Varieties

Chinese Rover Helps Find Evidence of Ancient Martian Shoreline

(FILES) This undated handout photograph released on June 11, 2021 by the China National Space Administration (CNSA) shows an image taken by a camera released from China's Zhurong Mars rover showing the rover (L) and the landing platform on the surface of Mars. (Photo by HANDOUT / China National Space Administration (CNSA) / AFP) CLIENTS
(FILES) This undated handout photograph released on June 11, 2021 by the China National Space Administration (CNSA) shows an image taken by a camera released from China's Zhurong Mars rover showing the rover (L) and the landing platform on the surface of Mars. (Photo by HANDOUT / China National Space Administration (CNSA) / AFP) CLIENTS
TT
TT

Chinese Rover Helps Find Evidence of Ancient Martian Shoreline

(FILES) This undated handout photograph released on June 11, 2021 by the China National Space Administration (CNSA) shows an image taken by a camera released from China's Zhurong Mars rover showing the rover (L) and the landing platform on the surface of Mars. (Photo by HANDOUT / China National Space Administration (CNSA) / AFP) CLIENTS
(FILES) This undated handout photograph released on June 11, 2021 by the China National Space Administration (CNSA) shows an image taken by a camera released from China's Zhurong Mars rover showing the rover (L) and the landing platform on the surface of Mars. (Photo by HANDOUT / China National Space Administration (CNSA) / AFP) CLIENTS

With the assistance of China's Zhurong rover, scientists have gathered fresh evidence that Mars was home to an ocean billions of years ago - a far cry from the dry and desolate world it is today.
Scientists said on Thursday that data obtained by Zhurong, which landed in the northern lowlands of Mars in 2021, and by orbiting spacecraft indicated the presence of geological features indicative of an ancient coastline. The rover analyzed rock on the Martian surface in a location called Utopia Planitia, a large plain in the planet's northern hemisphere.
The researchers said data from China's Tianwen-1 Orbiter, NASA's Mars Reconnaissance Orbiter and the robotic six-wheeled rover indicated the existence of a water ocean during a period when Mars might already have become cold and dry and lost much of its atmosphere.
They described surface features such as troughs, sediment channels and mud volcano formations indicative of a coastline, with evidence of both shallow and deeper marine environments, Reuters reported.
"We estimate the flooding of the Utopia Planitia on Mars was approximately 3.68 billion years ago. The ocean surface was likely frozen in a geologically short period," said Hong Kong Polytechnic University planetary scientist Bo Wu, lead author of the study published in the journal Scientific Reports.
The ocean appears to have disappeared by approximately 3.42 billion years ago, the researchers said.
"The water was heavily silted, forming the layering structure of the deposits," Hong Kong Polytechnic University planetary scientist and study co-author Sergey Krasilnikov added.
Like Earth and our solar system's other planets, Mars formed about 4.5 billion years ago. At the time the ocean apparently existed, it might already have begun its transition away from being a hospitable planet.
"The presence of an ancient ocean on Mars has been proposed and studied for several decades, yet significant uncertainty remains," Wu said. "These findings not only provide further evidence to support the theory of a Martian ocean but also present, for the first time, a discussion on its probable evolutionary scenario."
Water is seen as a key ingredient for life, and the past presence of an ocean raises the prospect that Mars at least at one time was capable of harboring microbial life.
"At the beginning of Mars' history, when it probably had a thick, warm atmosphere, microbial life was much more likely," Krasilnikov said.
The solar-powered Zhurong, named after a mythical Chinese god of fire, began its work using six scientific instruments on the Martian surface in May 2021 and went into hibernation in May 2022, likely met with excessive accumulation of sand and dust, according to its mission designer. It exceeded its original mission time span of three months.
Researchers have sought to better understand what happened to all the water that once was present on the Martian surface. Another study, published in August and based on seismic data obtained by NASA's robotic InSight lander, indicated that an immense reservoir of liquid water may reside deep under the surface within fractured igneous rocks.

Most Viewed

 
 
Varieties

Scientists Gather to Decode Puzzle of the World’s Rarest Whale in ‘Extraordinary’ New Zealand Study

A handout photo taken on July 5, 2024 and received on July 16 from the New Zealand Department of Conservation shows rangers Jim Fyfe (L) and Tumai Cassidy walking beside what appears to be the carcass of a rare spade-toothed whale after it was discovered washed ashore on a beach near Taieri Mouth in New Zealand's southern Otago province. (Handout / New Zealand Department of Conservation / AFP)
A handout photo taken on July 5, 2024 and received on July 16 from the New Zealand Department of Conservation shows rangers Jim Fyfe (L) and Tumai Cassidy walking beside what appears to be the carcass of a rare spade-toothed whale after it was discovered washed ashore on a beach near Taieri Mouth in New Zealand's southern Otago province. (Handout / New Zealand Department of Conservation / AFP)
TT
TT

Scientists Gather to Decode Puzzle of the World’s Rarest Whale in ‘Extraordinary’ New Zealand Study

A handout photo taken on July 5, 2024 and received on July 16 from the New Zealand Department of Conservation shows rangers Jim Fyfe (L) and Tumai Cassidy walking beside what appears to be the carcass of a rare spade-toothed whale after it was discovered washed ashore on a beach near Taieri Mouth in New Zealand's southern Otago province. (Handout / New Zealand Department of Conservation / AFP)
A handout photo taken on July 5, 2024 and received on July 16 from the New Zealand Department of Conservation shows rangers Jim Fyfe (L) and Tumai Cassidy walking beside what appears to be the carcass of a rare spade-toothed whale after it was discovered washed ashore on a beach near Taieri Mouth in New Zealand's southern Otago province. (Handout / New Zealand Department of Conservation / AFP)

It is the world’s rarest whale, with only seven of its kind ever spotted. Almost nothing is known about the enigmatic species. But on Monday a small group of scientists and cultural experts in New Zealand clustered around a near-perfectly preserved spade-toothed whale hoping to decode decades of mystery.

“I can’t tell you how extraordinary it is,” said a joyful Anton van Helden, senior marine science adviser for New Zealand’s conservation agency, who gave the spade-toothed whale its name to distinguish it from other beaked species. “For me personally, it’s unbelievable.”

Van Helden has studied beaked whales for 35 years, but Monday was the first time he has participated in a dissection of the spade-toothed variety. In fact, the careful study of the creature -- which washed up dead on a New Zealand beach in July — is the first ever to take place.

None has ever been seen alive at sea.

The list of what scientists don’t know about spade-toothed whales is longer than what they do know. They don’t know where in the ocean the whales live, why they’ve never been spotted in the wild, or what their brains look like. All beaked whales have different stomach systems and researchers don’t know how the spade-toothed kind processes its food. They don’t know how this one died.

Over the next week, researchers studying the 5-meter (16-foot) -long male at an agricultural research center near the city of Dunedin hope to find out.

“There may be parasites completely new to science that just live in this whale,” said van Helden, who thrilled at the chance of learning how the species produces sound and what it eats. “Who knows what we’ll discover?”

Only six other spade-toothed whales have ever been found, but all those discovered intact were buried before DNA testing could verify their identification.

New Zealand is a whale-stranding hotspot, with more than 5,000 episodes recorded since 1840, according to the Department of Conservation. The first spade-toothed whale bones were found in 1872 on New Zealand’s Pitt Island. Another discovery was made at an offshore island in the 1950s, and the bones of a third were found on Chile’s Robinson Crusoe Island in 1986.

DNA sequencing in 2002 proved that all three specimens were of the same species — and that it was distinct from other beaked whales. But researchers studying the mammal couldn’t confirm whether the species was extinct until 2010, when two whole spade-toothed whales, both dead, washed up on a New Zealand beach. But none has been studied before.

On Monday, the seventh of its kind, surrounded by white-aproned scientists who were measuring and photographing, appeared relatively unblemished, giving no clue about its death. Researchers pointed out marks from cookiecutter sharks — normal, they said, and not the cause.

The dissection will be quiet, methodical and slower than usual, because it is being undertaken in partnership with Māori, New Zealand's Indigenous people. To Māori, whales are a taonga -– a precious treasure -– and the creature will be treated with the reverence afforded to an ancestor.

Members of the local iwi, or tribe, will be present throughout the dissection and consulted at each turn, allowing them to share traditional knowledge and observe customs, such as saying a karakia -– a prayer -– over the creature before the study begins.

“According to our beliefs and our traditions, this whale is a gift of Tangaroa, deity of the ocean,” said Tumai Cassidy from the local people Te Rūnanga Ōtākou. “It’s very important for us to respect that gift and to honor the whale.”

The iwi will keep the jawbone and teeth of the whale at the end of the dissection, before its skeleton is displayed in a museum. 3D printing will be used to replicate those parts, using a CT scan taken of the whale’s head this week.

“It all builds a richer picture for that species but also tells us how it interacts with our oceans,” Cassidy said.

It’s thought that spade-toothed whales live in the vast Southern Pacific Ocean, home to some of the world’s deepest ocean trenches. Beaked whales are the ocean's deepest divers for food, and the spade-toothed may rarely surface, adding to its mystery.

The assembled scientists on Monday included a few who had traveled from abroad to see the whale, which was put in refrigerated storage after its discovery.

“What we are interested in is not only how these animals died, but how they lived,” said Joy Reidenberg, a comparative anatomist from the Icahn School of Medicine at Mount Sinai in New York. “In discovering how they live, we are hoping to find discoveries that we can apply back to the human condition.”