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Map reveals land beneath Antarctic ice sheet in unprecedented detail

Map reveals land beneath Antarctic ice sheet in unprecedented detail

Science
Dec. 12 (UPI) -- Scientists have successfully mapped the topography of the land beneath Antarctica's ice sheet at high resolution by combining radar observations with ice volume and flow velocity data. The new map will help scientists identify regions of ice that are likely to be more or less susceptible to the deleterious effects of climate change. The results of the BedMachine project, published this week in the journal Nature Geoscience, revealed a variety of interesting topographical features. Scientists found ridges that stabilize ice flowing across the Transantarctic Mountains, as well as structural features conducive to accelerated melting beneath the Thwaites and Pine Island glaciers in Western Antarctica. To build the new map, scientists sourced data from a wide diversity of so...
Denman Glacier: Deepest point on land found in Antarctica

Denman Glacier: Deepest point on land found in Antarctica

Science
Media playback is unsupported on your device The deepest point on continental Earth has been identified in East Antarctica, under Denman Glacier.This ice-filled canyon reaches 3.5km (11,500ft) below sea level. Only in the ocean are the valleys deeper still.The discovery is illustrated in a new map of the White Continent that reveals the shape of the bedrock under the ice sheet in unprecedented detail.Its features will be critical to our understanding of how the polar south might change in the future.For comparison, the lowest exposed land on Earth, at the Dead Sea shore, is just 413m (1,355ft) below sea level.The new finding shows, for example, previously unrecognised ridges that will impede the retreat of melting glaciers in a warming world; ...
Bloodhound land speed racer blasts to 628mph

Bloodhound land speed racer blasts to 628mph

Science
Media playback is unsupported on your device Bloodhound has now joined the exclusive club of land speed racers that have gone faster than 600mph (965km/h).Running across its dry lakebed track on Saturday, the British car's GPS sensors clocked 628mph (1,010km/h).Only six vehicles in the history of the land speed record have previously driven beyond 600mph.Bloodhound's achievement is notable because it's been running with only the thrust of a jet engine. The car's design allows for a rocket motor, too.When this is fitted next year, as planned, the arrow-shaped machine should be in a very strong position to smash the current world record of 763mph (1,228km/h).This was set 22 years ago by another British car, Thrust SSC. The driver back then was t...
Bloodhound land speed car will be back racing next week

Bloodhound land speed car will be back racing next week

Science
The Bloodhound land speed challenger is likely to be back out on its South African lakebed track early next week.Engineers are now satisfied they understand why a heat alarm has been triggering on the car when it runs. Bloodhound was in the middle of trying to post a speed of 550mph (885km/h) on Friday when the sensor system alerted driver Andy Green that temperatures might be too high in the engine bay.He aborted, pulling up early having reached only 481mph (774km/h).Something similar occurred on Wednesday as well, although right at the end of the run when the vehicle was slowing down.But by Saturday afternoon, the British Bloodhound team had split open the upper-chassis of the car for inspection, including of that troublesome s...
NASA: Water-hunting rover to land on lunar south pole in 2022

NASA: Water-hunting rover to land on lunar south pole in 2022

Science
Oct. 25 (UPI) -- Before the first woman and next man land on the moon, NASA will send another rover to the lunar surface, this time to the satellite's south pole. The Volatiles Investigating Polar Exploration Rover, or VIPER, will be designed to hunt for water on the lunar south pole. Planetary scientists are confident there is water ice on both the moon's poles, perhaps in the millions of tons. Still, scientists aren't certain about the exact whereabouts and nature of the moon's water reserves. VIPER could help NASA scientists develop more detailed resource maps as they prepare for send humans to the moon for the first time in decades. "The key to living on the Moon is water -- the same as here on Earth," Daniel Andrews, the project manager of the VIPER mission and director of engineeri...