You’re traveling more than 1,000 miles across the barren snowscape of Antarctica. Along the way, many crevasses lie hidden between you and your quest to resupply the hungry scientists at the Amundsen-Scott South Pole Station. The good news is you can detect these deathtraps with a radar arm. The bad news is it only gives you approximately four seconds of warning before you and your tracked vehicle, which weighs several tons, plummet to a dark and silent tomb. If only there were a robot that could map crevasses ahead of such expeditions. Preferably one with an adorable yet mildly ferocious name.
Meet the Yeti. This four-wheel-drive rover drags a ground-penetrating radar arm capable of logging information that tells scientists what lies—or more importantly, doesn’t lie—below. At just 180 pounds, the bot crosses snow-covered crevasses like it ain’t no thing. (Since people don’t wander around on foot down there, the real danger is the heavy tracked vehicles breaking through the snow bridges.) It functions at temperatures around -20 degrees Fahrenheit. In short, Yeti is an awesome little minion redrawing the boundaries of hazard georeferencing.
Most of us don’t have to think about such things, but doing science on the bottom of the world is a tricky endeavor. In addition to dangerous weather conditions and 30-foot-wide trapdoors in the ice, the logistics of assembling personnel, equipment, and supplies at the South Pole is nothing short of extraordinary.
“The focus of this effort was to support the actual operations and logistics side of the Polar Program,” James Lever, mechanical engineer and specialist in over-snow mobility for the U.S. Army’s Cold Regions Research and Engineering Laboratory, told me. (I bet you never heard a kindergartener say she wants to grow up to specialize in over-snow mobility.) Lever and his co-principal investigator professor Laura Ray published their findings this month in the Journal of Field Robotics. “Whether you have researchers in Antarctica or Greenland, you have to keep people safe and comfortable. You’re a long way from everything else and so it’s expensive to do science there.”
The little Yeti—and its predecessor, the solar-powered Cool Robot—have found support from the operations and science arms of the National Science Foundation as well as NASA’s Jet Propulsion Laboratory—after all, rover work on Earth’s poles isn’t so different from rover work on Mars or other celestial bodies. And the lessons we learn from tweaking Yeti may one day help us in space. For instance, one of the paper’s coauthors from the Thayer School of Engineering at Dartmouth College is developing an algorithm to detect characteristic moments just before Yeti gets stuck. If the algorithm can prevent the bot from getting into jams in the first place, it saves Lever and his colleagues an annoying trip out into the white. For NASA on the other hand, an immobilized rover is a really expensive bummer. For as Lever put it, “They don’t get theirs back.”
EU on high alert as Germany accepts Ebola patients 2014 07 30
A German hospital has agreed to treat Ebola patients amid widespread fears of a possible outbreak of the deadly disease in Europe. Over 670 people have already been killed by the disease in West Africa with doctors struggling to control the epidemic.
A German hospital in Hamburg agreed to accept patients following a request from the World Health Organization (WHO), Deutsche ...
Bolivia declares Israel terrorist regime 2014 07 30
Bolivia has declared Israel a “terrorist state” and revoked a visa exemption agreement with Tel Aviv in protest at the ongoing Israeli attacks on the besieged Gaza Strip.
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Medieval graffiti of straw kings, pentagrams, crosses, ships and "demon traps" have been offering a tantalising glimpse into England’s past. What do the pictures reveal about life in the Middle Ages?
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Armed with just a torch and a ...
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Scientists suspect not, but they’re still investigating the strange and alarming holes that are swallowing up the Siberian north.
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BLACKLISTED: The Secret Government Rulebook For Labeling You a Terrorist 2014 07 30 The Obama administration has quietly approved a substantial expansion of the terrorist watchlist system, authorizing a secret process that requires neither “concrete facts” nor “irrefutable evidence” to designate an American or foreigner as a terrorist, according to a key government document obtained by The Intercept.
The “March 2013 Watchlisting Guidance,” a 166-page document issued last year by the National Counterterrorism Center, ...