McAlester News-Capital, McAlester, OK

Features

September 25, 2013

With Earth spinning more slowly, time isn't flying as fast as before

Don't forget to set your clocks ahead two thousandths of a second before you go to sleep tonight. Same thing goes for bedtime tomorrow. And every day after that, because that is how much slower the Earth turns on its axis each day now than it did a century ago.

All of those sub-eyeblink slowdowns each century have been adding up, too. For Jurassic-era stegosauruses 200 million years ago, the day was perhaps 23 hours long and each year had about 385 days. Two hundred million years from now, the daily dramas for whatever we evolve into will unfold during 25-hour days and 335-day years.

"We naively think there always has been 24 hours per day," says Thomas O'Brian, chief of the Time and Frequency Division of the National Institute of Standards and Technology (NIST). "But that is not the case."

For all but the past 60 to 70 years, those extra milliseconds adding to each day did not matter one whit. The boss still can't tell if you arrive at work two milliseconds after 9 a.m. And twice a year, those accumulating micromoments essentially vanish when most of us adjust our clocks with the start or end of daylight saving time.

Except for one thing: Those micromoments don't actually vanish, and in an era of intense technology, they now matter a whole lot.

"We have become critically dependent on incredibly precise timekeeping," O'Brian says. Technologies such as smartphones, GPS devices and the power grid rely on thousands of separated elements — such as satellites, cell towers, generating stations, computers, electrical switches and countless computers — that cannot get more than a millionth of a second out of sync with one another before bad stuff happens.

Consider GPS signals between satellites and receivers on the ground. Those are radio signals that move at the speed of light, which means they travel about one foot every billionth of a second (which is a nanosecond). So if the clocks in GPS satellites and your GPS receiver drift just one millionth of a second — a thousand nanoseconds — out of sync with each other, the system will not pinpoint your location more precisely than within about two-fifths of a mile. If the synchronization drifts off by one thousandth of a second, the system couldn't tell you for sure if you were in Washington or Boston.

Text Only | Photo Reprints
Features
  • Easter Surprise Easter Surprise

    April 22, 2014 1 Photo

  • JECC Eggs 1 JECC Egg Hunt

    April 21, 2014 3 Photos

  • Lights On for Louie Lights On For Louie

    April 21, 2014 1 Photo

  • Baby Fair Baby Fair

    April 21, 2014 1 Photo

  • 7-10-ducks.jpg PAWS: Happy Easter

    As I was growing up, it seemed that Easter was always a time for giving a cute little furry animal as a gift. We seem to associate this holiday with bunnies and chicks, and of course, kitties and puppies.

    April 19, 2014 1 Photo

  • Fairly Snotty McAlester livestock report

    On Tuesday, 1,200 head of cattle were sold at the McAlester Union Stockyards. Steers sold $2 to $9 higher than at the last sale and heifers sold $4 to $8 higher.

    April 18, 2014 1 Photo

  • Low blood-sugar levels make for grousing spouses

    Husbands and wives reported being most unhappy with their spouses when their blood-sugar levels were lowest, usually at night, according to research released this week in the Proceedings of the National Academy of Sciences. Missing a meal, dieting or just being hungry may be the reason, researchers said.

    April 18, 2014

  • treadmill-very-fast.jpg Tax deduction for a gym membership?

    April marks another tax season when millions of Americans will deduct expenses related to home ownership, children and education from their annual tax bill. These deductions exist because of their perceived value to society; they encourage behaviors that keep the wheels of the economy turning. So why shouldn't the tax code be revised to reward preventive health?

    April 17, 2014 1 Photo

  • David Cantrell OSU Extension: Cattle tips for spring

    As we continue to move into spring here in Pittsburg County and cattle prices are at an all-time high, here are a few basic management tips to ensure herd health and productivity of the herd.

    April 16, 2014 1 Photo

  • RICHARDSON 50 1.jpg Richardsons celebrate 50 years of marriage

    Haileyville High School graduates Jim and Connie Richardson, of rural Claremore, will celebrate their 50th wedding anniversary Saturday.

    April 15, 2014 2 Photos

Seasonal Content
AP Video
Bon Jovi Helps Open Low-income Housing in Philly Pipeline Opponents Protest on National Mall Hagel Gets Preview of New High-tech Projects S.C. Man Apologizes for Naked Walk in Wal-Mart New Country Music Hall of Fame Inductees Named 'Piles' of Bodies in South Sudan Slaughter New Yorkers Celebrate Cherry Blossom Blooms SCOTUS Hears Tv-over-Internet Case Justice Dept. Broadening Criteria for Clemency Chief Mate: Crew Told to Escape After Passengers 'Miss Meadows' Takes Holmes Back to Her Roots Biden: Russia Must Stop Talking, Start Acting David Moyes Out As Manchester United Manager Raw: Leopard Bites Man in India Iowa College Finds Beauty in Bulldogs High Court to Hear Dispute of TV Over Internet Stowaway Teen Forces Review of Airport Security
NDN Video
Viral: It's Not Pitbull - It's Amy Poehler! Raw: Leopard Bites Man in India Jenna Dewan-Tatum Strips Down Rise of the Milkbots TRENDING: Brian Williams Raps 'Gin and Juice' on ‘Tonight Show’ Middle School heroes rescue students from burning bus WHOPPER OF FISHING STORY: Florida man catches massive Mako shark Maks Chmerkovskiy's "DWTS" Meltdown The many faces of Mike Woodson Ape Builds A Fire And Toasts Marshmallows In Amazing BBC Video Manchester Utd sack manager David Moyes "RHOA's" Dramatic Brawl High school, College Drug Ring Busted In Montgomery County High Court to Hear Dispute of TV Over Internet Raw: Keflezighi, Jeptoo Win Boston Marathon Teen hitchhikes in wheel well of flight from California to Hawaii Lindsay Lohan's Jaw-Dropping Secret President Sends Message To Boston And Marathon Runners LA Pastor Attracts Churchgoers with Pot Lauren Stoner Shows Off Her Incredible Bikini Body
Parade
Magazine

Click HERE to read all your Parade favorites including Hollywood Wire, Celebrity interviews and photo galleries, Food recipes and cooking tips, Games and lots more.