Life is short... but only if you're boring

Martha Gill's Irrational Animals column.

Three years ago I went skydiving. It’s hard to remember how I convinced myself to do this, but it probably had parallels with how I get up in the mornings, exercise, or start going out with people: blurrily pretending it’s not happening until far too late.

But from the moment major fear kicked in, as I sat on the rattling edge between the inside of a plane and my dangling, sky-surrounded legs, my recall is near perfect.

The plane was dark pink. I was strapped to an instructor, who had the parachute, but there was also a pale green handle attached to my left side, just under my hand.

“Is this the cord that releases the parachute?”

“No, that’s the handle that separates you from me.”

I let go of the handle, the straps and my own sleeves, and spent the fall in the uncomplicated pose of Coyote from Looney Tunes, after he’s already hit the ground. It was extremely cold, I couldn’t really see, and the G-forces toyed with me like lint in a Dyson.

After exactly 20 minutes of this, the parachute opened.  “Wow, that was amazing,” I said, “really, really amazing.”

“Stop panicking – we’re nearly done.”

We were. The whole thing was over in four minutes  - the free-fall bit had been a matter of seconds. But my memory of it plays out as a full 20-minute narrative.

Physicists tell us that time can speed up, warp and shoot off in odd directions, but we never seem to feel these changes. Our inner clock usually records time passing in a manner that is fairly well synced to our wristwatches. In certain situations, though, especially those inspired by fear, our minds seem to be able to stretch time out like a wet jumper.

An experiment conducted by David Eagleman at the Baylor College of Medicine aimed to work out whether this odd illusion was experienced in the moment of fear itself, or after.  Do we, like characters in the Matrix, see time passing at a slower rate as we experience it (low pitched bullets droning past, water droplets suspended like jellies) or do we make it all up afterwards?

He persuaded a number of brave participants to SCAD-jump – drop 150 unsupported feet into a net. This was terrifying enough to bring out the slow-motion effect: afterwards, on average, the subjects overestimated the length of their fall by 36 per cent.

He gave everyone a chronometer, a watch that flashes numbers a little too fast to see. If the fallers experienced time-slowing, he reckoned they just might be able to see the numbers on their way down.

This turned out not to be the case, and he concluded that the time mistake happened in the memory. The slowed effect, he suggested, had been a function of hyper fast brain activity. The amygdala (seat of emotion and memory) had been jolted into recording every last detail of the experience. Rolled out afterwards, the bulked-up memory seemed to stretch far longer than would be accurate.

Live fast, live long

Time for us, then, depends a little on sensation. The days may indeed go faster as we get older and more emotionally stable, but expand again when we do something exciting.

So perhaps my conclusion should be “live fast: live long” – cramming our days with adrenaline highs might be the best way to slow the vertiginous pace of time. Interesting, but also, in some ways, very much whatevs. I’m not skydiving again.

Skydiving. Photograph: Getty Images

Martha Gill writes the weekly Irrational Animals column. You can follow her on Twitter here: @Martha_Gill.

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“A cursed project”: a short history of the Facebook “like” button

Mark Zuckerberg didn't like it, it used to be called the “awesome button”, and FriendFeed got there first. 

The "like" button is perhaps the simplest of the website's features, but it's also come to define it. Companies vie for your thumbs up. Articles online contain little blue portals which send your likes back to Facebook. The action of "liking" something is seen to have such power that in 2010, a class action lawsuit was filed against Facebook claiming teenagers should not be able to "like" ads without parental consent. 

And today, Facebook begins trials of six new emoji reaction buttons which join the like button at the bottom of posts, multiplying its potential meanings by seven: 

All this makes it a little surprising that Facebook CEO Mark Zuckerberg spent a good portion of the noughties giving the like button a thumbs down. According to Andrew Bosworth, Vice President of Advertising and Pages at Facebook (and known simply as "Boz") it took nearly two years to get the concept of an approval button for posts off the ground.

In a fascinating Quora thread, Boz explains that the idea of a star, plus sign or thumbs up for posts first came up in July 2007, three years after "TheFacebook" launched in 2004. Throughout these initial discussions, the proposed bursts of positivity was referred to as an "awesome button". A few months later someone floated the word "like" as a replacement, but, according to Boz, it received a "lukewarm" reception. 

The team who ran the site's News Feed feature were keen, as it would help rank posts based on popularity. The ad team, meanwhile, thought "likes" could improve clickthrough rates on advertisements. But in November 2007, the engineering team presented the new feature to Mark Zuckerberg, and, according to Boz, the final review "[didn't] go well". The CEO was concerned about overshadowing the Facebook "share" and comment features - perhaps people would just "awesome" something, rather than re-posting the content or writing a message. He also wanted more clarification on whether others would see your feedback or not. After this meeting, Boz writes, "Feature development as originally envisioned basically stops". 

The teams who wanted the button forged ahead with slightly different features. If you were an early user, you might remember that News Feed items and ads collected positive or negative feedback from you, but this wasn't then displayed to other users. This feature was "ineffective", Boz writes, and was eventually shut down. 

So when Jonathan Piles, Jaren Morgenstern and designer Soleio took on the like button again in December 2008, many were skeptical: this was a "cursed project", and would never make it past a sceptical Zuckerberg. Their secret weapon, however was data scientist Itamar Rosenn, who provided data to show that a like button wouldn't reduce the number of comments on a post. - that, in fact, it increased the number of comments, as likes would boost a popular post up through the News Feed. Zuckerberg's fears that a lower-impact feedback style would discourage higher value interactions like reposting or commenting were shown to be unfounded. 

A bigger problem was that FriendFeed, a social aggregator site which shut down in April 2015, launched a "like" feature in October 2007, a fact which yielded some uncomfortable media coverage when Facebook's "like" finally launched. Yet Boz claims that no one at Facebook clocked onto FriendFeed's new feature: "As far as I can tell from my email archives, nobody at FB noticed. =/". 

Finally, on 9 February 2009, "like" launched with a blogpost, "I like this", from project manager Leah Pearlman who was there for the first "awesome button" discussions back in 2007. Her description of the button's purpose is a little curious, because it frames the feature as a kind of review: 

This is similar to how you might rate a restaurant on a reviews site. If you go to the restaurant and have a great time, you may want to rate it 5 stars. But if you had a particularly delicious dish there and want to rave about it, you can write a review detailing what you liked about the restaurant. We think of the new "Like" feature to be the stars, and the comments to be the review.

Yet as we all know, there's no room for negative reviews on Facebook - there is no dislike button, and there likely never will be. Even in the preliminary announcements about the new emoji reactions feature, Zuckerberg has repeatedly made clear that "dislike" is not a Facebook-worthy emotion: "We didn’t want to just build a Dislike button because we don’t want to turn Facebook into a forum where people are voting up or down on people’s posts. That doesn’t seem like the kind of community we want to create."

Thanks to the new buttons, you can be angry, excited, or in love with other people's content, but the one thing you can't do is disapprove of its existence. Championing positivity is all well and good, but Zuckerberg's love of the "like" has more to do with his users' psychology than it does a desire to make the world a happier place. Negative feedback drives users away, and thumbs-down discourages posting. A "dislike" button could slow the never-ending stream of News Feed content down to a trickle - and that, after all, is Facebook's worst nightmare. 

Barbara Speed is a technology and digital culture writer at the New Statesman and a staff writer at CityMetric.