On August 8, as Tiger Woods played this year's 2018 PGA Championship in St Louis, Missouri, not every eye was on him. One Twitter user was looking at the crowds.
Jamie Kennedy, who in his Twitter profile identifies himself as content director for The European Tour and Ryder Cup Europe, tweeted a photo comparing the crowds watching Tiger Woods play in 2002 versus 2018. The difference? Sixteen years ago the spectators were just watching Woods; now they're nearly all filming the action via their smartphones.
It's a perfect illustration of one of the ways smartphones have changed our lives.
"Most people check their phone every 15 minutes or less, even if they have no alerts or notifications," Larry Rosen, psychology professor and author of The Distracted Mind, tells CNBC.
The vast majority of Americans have a cellphone, and 77 percent own Smartphones, according to PEW Research, which is up 35 percent since just 2011.
Here's a look at how people had experiences before Smartphones — and how they do it now.
Sporting events
As Kennedy pointed out via Twitter, when Tiger Woods played in the early 2000s (before the iPhone was released in 2007), as he did at Target World Challenge on December 11, 2005 at the Sherwood Country Club in Thousand Oaks, California, fans watched.
Many more golf lovers shot Woods playing golf at the 2018 PGA Championship in August in St Louis via their smartphones.
Restaurants
Before smartphones, diners would look at each other and have conversations, as these two did in 2003 over McDonald's.
Now it's often just as much about the smartphone as it is the company. Diners at Peruvian restuarant at Chalan on the Beach in Miami, Forida, sit looking at their smartphones in 2014.
Plus, you have to take a picture of it before you eat it, like this man taking a selfie with his tapas in 2018.
Tourist attractions
Before smartphones, tourists would just gaze at the attraction and then ask a bystander to snap a photo of them in front of it, as members of the National Youth Theatre may have done in Red Square in Moscow, Russia, in 1989. (Source: Georges De Keerle/Getty)
Now tourists take selfies, like these travelers at Red Square in Moscow in July 2018.
Celebrities
Actors used to give fans autographs, as Will Smith did in Times Square in Manhattan, New York in 1999.
Now, they take selfies with stars like Henry Cavill, here at Paramount Pictures' "Mission: Impossible Fallout" premiere in Washington D.C. in July 2018.
Concerts
Before Smartphones, people would hold up lighters during songs they loved at concerts, like fans did here, circa 2000.
Now concert-goers light up the stadium with sartphones, like they did in July 2017 during a U2 concert in Paris.
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