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Preserving the President: Abraham Lincoln, Grave Robbers, and an Excellent Embalmer

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President Lincoln's funeral train in Philidelphia near the start of its 13 day journey from Washington to Springfield. Photo courtesy of

After Abraham Lincoln was assassinated in 1865, his body was taken from Washington, D.C., by train to be laid in a tomb in Springfield, Illinois. The funeral train carried the president, some 300 mourners, an honor guard, and the disinterred body of Lincoln’s son, Willie, which would be laid to rest near his father. The train made 11 stops along the way, loosely retracing the route Lincoln had taken to Washington for his first inauguration, so that his body could lay in state and the public could pay their respects.

The 1654-mile journey took 13 days, during which the body was viewed by hundreds of thousands of people. Perhaps one of the most important, and ghoulish, bits of logistics that had to be sorted out for the funeral was keeping the body preserved, and presentable, until it reached its destination. Funeral embalming was a relatively new development at that time, but had proven itself on the battlefields of the Civil War. Dr. Thomas Holmes, the "father of American embalming," claimed to have personally embalmed more than 4000 Union soldiers for shipment back home for burial, and had trained others to do the same work using his techniques.

Preservatives Added

The task of embalming Lincoln fell to Drs. Charles Brown and Harry Cattell, using a form of the arterial embalming method developed in Europe, where an artery was opened and the body flushed of blood and filled with a chemical preservative. In their variation on the procedure, Brown and Cattell drained Lincoln's blood through his jugular and then pumped in Brown’s patented embalming fluid through an incision in his thigh. They shaved Lincoln’s face, leaving only a tuft of hair on the chin, set his mouth in a slight smile, and dressed him in a suit.

Brown’s advertisements touted that the bodies he embalmed would “be kept in the most perfect and natural preservation,” a claim that would be put to the test on the funeral train. To keep the body in the condition that the embalmers had promised, Cattell even traveled with the funeral party, providing the president’s body with “touch-ups” along the way.

Protecting the President

A little more than 10 years after Lincoln was laid in the tomb, a group of counterfeiters attempted to steal his remains and hold them for ransom. As the grave robbers began to move the coffin, an undercover Secret Service agent that had infiltrated the gang called in police backup to chase them down and capture them.

This attempted theft of Lincoln’s body helped spur his son Robert’s decision to have the coffin buried in a concrete-encased vault during a renovation of the tomb in 1901. Before the burial, the question came up as to whether or not someone should open the coffin and view the remains. Rumors that the grave robbing was actually successful had circulated for years, and this would be the last chance to put them to rest.

The coffin was opened and 23 people inspected what lay in it. They all agreed it was the president and that he was in fine condition. His features were still recognizable and the wart on his cheek was still there. His chin whiskers remained and his hair was still thick (though his eyebrows had disappeared).

Brown and Cattell had more than made good on their promises. J. C. Thompson, one of the men who viewed the body 36 years after Lincoln had died, later said, “Anyone who had ever seen his pictures would have known it was him. His features had not decayed. He looked just like a statue of himself lying there."

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The Brain Chemistry Behind Your Caffeine Boost
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Whether it’s consumed as coffee, candy, or toothpaste, caffeine is the world’s most popular drug. If you’ve ever wondered how a shot of espresso can make your groggy head feel alert and ready for the day, TED-Ed has the answer.

Caffeine works by hijacking receptors in the brain. The stimulant is nearly the same size and shape as adenosine, an inhibitory neurotransmitter that slows down neural activity. Adenosine builds up as the day goes on, making us feel more tired as the day progresses. When caffeine enters your system, it falls into the receptors meant to catch adenosine, thus keeping you from feeling as sleepy as you would otherwise. The blocked adenosine receptors also leave room for the mood-boosting compound dopamine to settle into its receptors. Those increased dopamine levels lead to the boost in energy and mood you feel after finishing your morning coffee.

For a closer look at how this process works, check out the video below.

[h/t TED-Ed]

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Sophie Nightingale / University of Warwick
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Can You Spot Which Photo Is Fake? Most People Can’t
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Sophie Nightingale / University of Warwick

In a digital world, it’s easier than ever to fool people. Sophisticated Photoshop jobs, social media, and viral news cycles mislead readers into mistaking shots from a Lebanese music video for real scenes of destruction from Aleppo, thinking that Vladimir Putin was the center of attention at the G-20 summit, or believing that Elizabeth Taylor and Marilyn Monroe posed together for a photo shoot in the park.

While it would be nice to tell ourselves that we would never be duped by such fake images, the truth is, most people can’t distinguish between a manipulated photo and a real one. That’s the takeaway from a new study in Cognitive Research: Principle and Implications. As the team at Science reports, the participants were only able to pinpoint fake images two-thirds of the time.

First, psychologists from the University of Warwick asked more than 700 volunteers to look at real and fake images and identify the changes. The researchers used 10 color photographs sourced from Google searches, manipulating them through airbrushing, adding elements in, subtracting elements, and distorting shadows, and shearing trees. They applied each of these five manipulation techniques separately to a portion of the photos, eventually creating 30 manipulated photos and 10 real ones. All the participants saw one of each of the manipulation types in different photos.

An older man stands in the street in front of a house.
Can you spot the differences between the manipulated image at the top of the page and the original version above?
Sophie Nightingale / University of Warwick

The participants performed slightly above chance rates, identifying photos correctly as real only 58 percent of the time and spotting manipulations 66 percent of the time. Even when they did identify a manipulated photo, though, they didn’t necessarily know where it had been altered.

In a second study, the researchers did the same thing, but using photos study co-author Sophie J. Nightingale took with her Nikon camera, controlling for the fact that images found online could be manipulated before the researchers even downloaded them. They then had almost 660 people take an online survey testing their ability to spot fakes. They had to look at photos and label whether it was fake and if they could see where it was manipulated, whether it was fake but they didn’t know where it had been altered, or whether it was an original. At the end of the study, the subjects identified just 62 percent of the fake images correctly.

Woman standing outside
The first image is the original. The second was manipulated to add in a water spout, airbrush the woman's face, and make other slight changes.
Sophie Nightingale / University of Warwick

The results were the same regarding images that had been manipulated in both overtly unrealistic ways and photos that featured more plausible changes. One reason might be the way that our visual system simplifies information. As long as object geometries and shadows are roughly correct, our eyes accept them as accurate.

“It remains to be determined whether it is possible to train people to make use of physically implausible inconsistencies,” the researchers write. “Perhaps one possibility would entail ‘teaching' the visual system to make full use of physical properties of the world as opposed to automatically simplifying them.”

You can still take a 10-minute online survey for the project here and test your own manipulation awareness skills. (I had to take wild guesses on most of them.)

If this makes you weep for the future of the world, at least know that it’s a timeless problem. Manipulated, misleading images have been around since the earliest days of photography.

[h/t Science]

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