How Old Is the Grand Canyon? Depends Who You Ask.

SLATE VIDEO
How Old Is the Grand Canyon?Depends who you ask.
Video
March 19 2014 3:24 PMThe Solar System's Biggest Moon, MappedJupiter's icy Ganymede.
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March 4 2014 2:50 PMTetris Can Curb Booze and Cigarette CravingsThe game may distract your brain from your vices.
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March 3 2014 3:56 PMDark Chocolate Is Good for Your HeartEven without the much-touted flavonol.
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Feb. 28 2014 6:21 PMThe Many Voices of Meryl StreepFrom Android to Australian.
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Feb. 28 2014 10:30 AMWhat Would It Take to Get a "Space Elevator" to the Sky?Some experts say it's feasible.
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Feb. 27 2014 9:30 AMThe Lasers Are Upon UsAfter years of fanfare, U.S. military lasers are ready to go.
Video
March 4 2014 4:14 PMGliding Through the Ocean From a Shark's Point of ViewCourtesy of a mounted camera.
Video
March 3 2014 4:51 PMHow Can a Blood Test Tell if You're Schizophrenic?The new method could launch within 18 months.
Video
March 2 2014 1:00 PMThe Food Nutritional Labels of the FutureIf approved by the FDA.
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Feb. 28 2014 1:10 PMKaty Perry Camp Edits “Dark Horse” Video After Muslim OutcryOops. 
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Feb. 28 2014 9:20 AMThe Least Sympathetic Victims of the Polar VortexGoodbye, Asian stink bug.

TODAY IN SLATE

The World

How Canada’s Shooting Tragedies Have Shaped Its Gun Control Politics

Where Ebola Lives Between Outbreaks

Gunman Killed Inside Canadian Parliament; Soldier Shot at National Monument Dies

Sleater-Kinney Was Once America’s Best Rock Band

Can it be again?

Paul Farmer: Up to 90 Percent of Ebola Patients Should Survive

Is he right?

Science

“I’m Not a Scientist” Is No Excuse

Politicians brag about their ignorance while making ignorant decisions.

Technology

Driving in Circles

The autonomous Google car may never actually happen.

In Praise of 13th Grade: Why a Fifth Year of High School Is a Great Idea 

PowerPoint Is the Worst, and Now It’s the Latest Way to Hack Into Your Computer

  News & Politics
Politics
Oct. 22 2014 9:42 PM Landslide Landrieu Can the Louisiana Democrat use the powers of incumbency to save herself one more time?
  Business
Continuously Operating
Oct. 22 2014 2:38 PM Crack Open an Old One A highly unscientific evaluation of Germany’s oldest breweries.
  Life
Gentleman Scholar
Oct. 22 2014 5:54 PM May I Offer to Sharpen My Friends’ Knives? Or would that be rude?
  Double X
The XX Factor
Oct. 22 2014 4:27 PM Three Ways Your Text Messages Change After You Get Married
  Slate Plus
Tv Club
Oct. 22 2014 5:27 PM The Slate Walking Dead Podcast A spoiler-filled discussion of Episodes 1 and 2.
  Arts
Brow Beat
Oct. 22 2014 10:39 PM Avengers: Age of Ultron Looks Like a Fun, Sprawling, and Extremely Satisfying Sequel
  Technology
Future Tense
Oct. 22 2014 5:33 PM One More Reason Not to Use PowerPoint: It’s The Gateway for a Serious Windows Vulnerability
  Health & Science
Wild Things
Oct. 22 2014 2:42 PM Orcas, Via Drone, for the First Time Ever
  Sports
Sports Nut
Oct. 20 2014 5:09 PM Keepaway, on Three. Ready—Break! On his record-breaking touchdown pass, Peyton Manning couldn’t even leave the celebration to chance.