More Mars Methane: Curiosity Rover Spots Biggest Surge Yet

https://www.space.com/curiosity-mars-rover-highest-levels-methane.html

NASA’s Curiosity rover has sniffed out another surge of the potentially life-indicating gas methane on Mars, and this one is the biggest yet.

The six-wheeled robot detected methane levels around 21 parts per billion per unit volume (ppbv) last week inside the 96-mile-wide (154 kilometers) Gale Crater, NASA officials announced yesterday (June 23). That’s far higher than the normal background concentration at Gale, which Curiosity has determined ranges seasonally from about 0.24 ppbv to 0.65 ppbv.

The new result is exciting, because the vast majority of methane in Earth’s air is generated by microbes and other organisms. But we can’t assume Martians were involved. Methane can also be produced abiotically — via the reaction of hot water with certain types of rock, for example.

Related: The Search for Life on Mars: A Photo Timeline

“With our current measurements, we have no way of telling if the methane source is biology or geology, or even ancient or modern,” Paul Mahaffy, of NASA’s Goddard Space Flight Center in Greenbelt, Maryland, said in a statement. Mahaffy is principal investigator of Curiosity’s Sample Analysis at Mars (SAM) instrument, which detected the recent surge.

Curiosity has also sniffed out two other spikes of the gas — one in June 2013 and another that lasted from late 2013 through early 2014. Both of those were considerably smaller, peaking at around 6 or 7 ppbv, according to the rover’s measurements

This past April, scientists announced that Europe’s Mars Express orbiter had confirmed the June 2013 surge. But not all orbital measurements add up so nicely. 

For example, the Trace Gas Orbiter, a joint European-Russian probe designed to hunt for methane and other low-abundance gases in the Martian atmosphere, found hardly any methane at all during its first round of observations last year.

The SAM team conducted a separate experiment over the weekend in an attempt to better understand this most recent methane spike, and perhaps get a better handle on the many mysteries swirling around the gas.

“Combining observations from the surface and from orbit could help scientists locate sources of the gas on the planet and understand how long it lasts in the Martian atmosphere,” NASA officials said in the same statement. “That might explain why the Trace Gas Orbiter’s and Curiosity’s methane observations have been so different.”

Mike Wall’s book about the search for alien life, “Out There” (Grand Central Publishing, 2018; illustrated by Karl Tate), is out now. Follow him on Twitter @michaeldwall. Follow us on Twitter @Spacedotcom or Facebook.

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via Space.com http://bit.ly/2WPkkGi

June 24, 2019 at 01:33PM

Boeing Has So Many Grounded 737 Max Planes Waiting to Be Fixed They’re Parking Them in the Employee Parking Lot

https://jalopnik.com/boeing-has-so-many-grounded-737-max-planes-waiting-to-b-1835811860

You may recall that, thanks to an issue with faulty sensors in the Boeing 737 Max flight control systems, those planes have been grounded after multiple crashes were found to be related to the issue. Grounded planes are, by definition, not in the air, and as such need to be stored, on the ground, somewhere. In the case of Boeing’s Renton Factory in Washington state, there’s so many grounded planes that some of that ground has to be taken from Boeing’s employee parking lots.

As you can imagine, seeing the planes parking among people’s everyday commuter cars is a strange sight, which has led to pictures like these being posted on Twitter:

… and Instagram:

Seattle’s King 5 News has some very comprehensive aerial footage of the factory, which gives a sense of just how many of these planes are parked at Boeing’s factory right now:

That’s a lot of planes. There’s about 500 grounded 737 Max jets around the world, as Bloomberg notes, with about 100 stuck at Boeing’s Renton factory. Those are the planes we’re seeing here, parked alongside people’s Priuses and Explorers.

I wonder if you can snag a spot under the wings if it’s raining?

About the author

Jason Torchinsky

Senior Editor, Jalopnik • Running: 1973 VW Beetle, 2006 Scion xB, 1990 Nissan Pao, 1991 Yugo GV Plus • Not-so-running: 1973 Reliant Scimitar, 1977 Dodge Tioga RV (also, buy my book!)

via Gizmodo https://gizmodo.com

June 24, 2019 at 02:09PM