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'Curiosity' rover confirms Mars air mostly CO2

Mars air mostly CO2, rover finds

The Curiosity rover has tasted Mars' air: It's made mostly of carbon dioxide with hints of other gases. The measurements closely match what the twin Viking landers detected in the late 1970s and what scientists have gleaned from Martian meteorites. Mars' atmosphere is overwhelmingly dominated by carbon dioxide, unlike Earth's air, which is a mix of nitrogen and oxygen. There was a small surprise: Viking found nitrogen to be the second most abundant gas in the Martian air, but Curiosity's measurements revealed a nearly equal abundance of nitrogen and argon, a stable noble gas. Mission scientists suspect it might have to do with the different tools used.

U.S. heat wave stuck in reverse

The sweltering weather in the Northeast has surprised meteorologists: It's moving backward across America, which rarely happens. U.S. weather systems normally move west to east. The western Atlantic high pressure system behind the hot weather started moving east to west last week and by Tuesday was centered over lower Michigan, the National Weather Service said. Forecasters say the high pressure is about to return eastward, extending the Northeast's heat wave a day or two. Thursday the heat index, which factors in humidity, hit 106 degrees in Washington, Baltimore and Philadelphia.

Find may be Civil War cannonball

Atlanta police say a construction crew on Thursday unearthed what appears to be a cannonball near Centennial Olympic Park. Police spokesman John Chafee says bomb technicians said the artifact may be from the Civil War era, but it has not yet been examined by an expert. When federal troops besieged Atlanta in 1864, they fired thousands of cannon shells into the downtown area that now includes the park.

Associated Press

'Curiosity' rover confirms Mars air mostly CO2 07/18/13 [Last modified: Thursday, July 18, 2013 10:32pm]
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  1. Observations from a liberal, gay, Latino, feminist Florida House freshman

    Blogs

    State Rep. Carlos Guillermo Smith, D-Orlando,  rocked the Florida LGBTA Democratic Caucus dinner at Tallahassee's Hotel Duval Satursday night with his unabashedly liberal and passionate take on the myriad issues he said are key to LGBTQ Floridians. Among them: Access to guns, Reproductive rights, home …

    Carlos G. Smith
  2. Delta Sigma Theta honors outgoing national president

    Human Interest

    During her four years as national president of Delta Sigma Theta Sorority, Inc., Paulette Walker said she always focused on the comma between "Sorority" and "Inc."

    Paulette Walker, the former director of undergraduate programs and internship in the College of Education at the University of South Florida, will be honored on Saturday for her leadership in the Delta Sigma Theta sorority.
  3. 10 sailors missing, 5 hurt in collision of USS John S. McCain

    SEOUL —Ten U.S. Navy sailors are missing and five have been injured after the USS John S. McCain destroyer collided with an oil tanker near Singapore early Monday morning.

    In this Jan. 22, 2017, photo provided by U.S. Navy, the USS John S. McCain patrols in the South China Sea while supporting security efforts in the region. The guided-missile destroyer collided with a merchant ship on Monday, Aug. 21, in waters east of Singapore and the Straits of Malacca. Ten sailors were missing, and five were injured, the Navy said. [James Vazquez/U.S. Navy via AP]
  4. Pasco County Fire Rescue fighting a two-alarm fire started by an explosion

    Fire

    Two houses are on fire and one victim has been critically burned and taken to a trauma center following an explosion at a home at 8652 Velvet Dr, in Port Richey.

  5. Rays see the Blake Snell they've been waiting for in win over Mariners

    The Heater

    ST. PETERSBURG — It was a one-run game Sunday when the Mariners' Robinson Cano singled with one out in the seventh inning, bringing the dangerous Nelson Cruz to the plate.

    Tampa Bay Rays starting pitcher Blake Snell (4) throwing in the third inning of the game between the Seattle Mariners and the Tampa Bay Rays at Tropicana Field in St. Petersburg, Fla. on Sunday, Aug. 20, 2017.