13 Facts About Opossums

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Opossums, which include the roughly 100 species in the order Didelphimorphia, are some of the most misunderstood animals in the Americas. They’re often thought of as dimwitted, dirty creatures whose most impressive trick is acting like roadkill. The truth is just the opposite: Opossums are smarter, cleaner, and more beneficial to humans than many of their woodland neighbors. Read on for more opossum facts.

1. OPOSSUMS AND POSSUMS AREN’T THE SAME ANIMAL.

In North America, opossum and possum describe the same thing, but in Australia the word possum refers to a completely different animal. Among the most well known of their respective types are the Virginia opossum and the brushtail possum. Both are small to medium sized, omnivorous marsupials, but the similarities end there. The possum looks like a cute cross between a squirrel and a chinchilla and it belongs to a different order than the North American mammal that shares (most of) its name. Despite the potential for confusion, possum is accepted as the shortened version of opossum in this part of the world (and if you see the word possum in this list, you can assume it’s referring to the animal from the Americas).

2. THEY’RE THE ONLY MARSUPIALS FOUND NORTH OF MEXICO.

Marsupials—mammals that carry and nurse their young in pouches—are absent from much of the world, and in Canada and the United States opossums are the sole representatives of the group. Like other marsupials, mother possums give birth to tiny, underdeveloped offspring (called joeys) that immediately crawl into a pouch where they live and nurse during their first months of life. Only once they’ve grown big and strong enough do they venture out, transitioning between their mother’s back and the warmth of the pouch until they mature into adults.

3. THEY CAN’T CHOOSE WHEN THEY PLAY DEAD.

Possum playing dead.
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Perhaps the most famous characteristic of the opossum is its tendency to play dead in front of predators. When the animal experiences intense fear in the face of danger, it seizes up and flops to the ground where it can remain for hours staring blankly ahead and sticking out its tongue. It’s an impressive defensive mechanism, but its effectiveness can’t be chalked up to the possum’s acting skills. Possums have no control over when they play dead or for how long they do it: The comatose-like state is an involuntary reaction triggered by stress.

4. AN OFFENSIVE ODOR SELLS THE PERFORMANCE.

A picture of a possum playing dead doesn’t really do it justice. To get the full experience, you need to be standing over to it to smell the putrid odor it emits when pretending to be a corpse. The smelly substance it secretes from its anus is just one more reason for foxes and bobcats to look for their dinner elsewhere.

5. THEY SLOW THE SPREAD OF LYME DISEASE.

Even if possums aren’t the cutest creatures in the forest, they should be a welcome addition to your backyard. Unlike other mammals that carry ticks, and therefore spread Lyme Disease, possums gobble up 90 percent of the ticks that attach to them. According to the National Wildlife Federation, a single possum consumes 5000 of the parasites per tick season. That means the more possums that are in your area, the fewer ticks you’ll encounter.

6. THEIR MEMORIES ARE SURPRISINGLY SHARP.

Possum looking up at table.
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Opossums have impressive memories—at least when it comes to food. Researchers found that possums are better at remembering which runway led to a tasty treat than rats, cats, dogs, and pigs. They can also recall the smell of toxic substances up to a year after trying them.

7. THEY’RE IMMUNE TO MOST SNAKE VENOM.

While most animals look at a snake and see danger, a possum sees its next meal. The animals are immune to the venom of nearly every type of snake found in their native range, the one exception being the coral snake. Possums take advantage of this adaptation by chowing down on snakes on a regular basis.

Researchers have been trying to harvest possums’ antivenom powers for decades. A few years ago, a team of scientists made progress on this front when they recreated a peptide found in possums and and found that mice given the peptide and rattlesnake venom were successfully protected from the venom’s harmful effects.

8. THEY ALMOST NEVER GET RABIES.

While possums aren’t totally immune to rabies (a few cases have been documented), finding a specimen with the disease is extremely unlikely. Marsupials like possums have a lower body temperature than the placental mammals that dominate North America—in other words, their bodies don’t provide a suitable environment for the virus.

9. THEIR TAIL ACTS AS A FIFTH APPENDAGE.

Baby opossum hanging from a tree branch by its tail.
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Opossums are one of a handful of animals with prehensile tails. These appendages are sometimes used as an extra arm: They can carry grass and leaves for building nests or grip the sides of trees to provide extra stability while climbing. Baby possums can even use their tails to hang from branches upside down as they’re often depicted doing in cartoons. But it’s a myth that possums sleep this way: Their tails are only strong enough to hold them for a short amount of time.

10. THEY’RE CONSTANTLY SELF-GROOMING.

Thanks to their whole acting-and-smelling-like-a-corpse routine, opossums aren’t known as the most sanitary animals in nature. But they take cleanliness seriously: The Washington Department of Fish and Wildlife writes that possums, like housecats, use their tongue and paws to groom themselves frequently and thoroughly. Possums largely lack sweat glands, and this behavior is believed to help them cool down. It also has the added effect of rendering them odorless (when they’re not secreting stinky predator-repellant, that is).

11. THEIR EYES AREN’T TOTALLY BLACK.

Close-up on opossum's face.
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One of the opossum’s most recognizable features is its pair of opaque eyes. Opossum eyes do have whites and irises, but because their pupils are so large, their eyes appear completely black from a distance. The exaggerated pupil dilation is thought to help the nocturnal animals see after the sun goes down.

12. THEY’RE SOCIAL CREATURES.

It was long assumed that opossums like to keep to themselves, but a study published in the journal Biology Letters suggests they have a social side. Researchers at the Federal University of Pernambuco in Recife, Brazil observed some possums in captivity sharing dens even if they weren’t mates. In one case, 13 white-eared opossums of various age groups were cohabiting the same space. The scientists suspect that male and female possums living in the wild may even build nests together as a way to trigger the female’s reproductive hormones.

13. THEIR REPRODUCTIVE SYSTEMS ARE COMPLICATED.

The way it gives birth and raises its young isn’t the only thing that’s interesting about the opossum's reproductive life. Females have two vaginal tracts and two uteri, and males in turn have a forked or bifurcated penis. This is fairly typical for marsupials, but when European colonizers first landed in North America centuries ago, they didn’t know what to make of the confusing genitalia. One explanation they came up with was that male opossums impregnated females through the nose.

9 Facial Reconstructions of Famous Historical Figures

A facial reconstruction of King Richard III unveiled by the Richard III Society in 2013
A facial reconstruction of King Richard III unveiled by the Richard III Society in 2013
Dan Kitwood/Getty Images

Why look at a painting of a historical figure when you can come face to face with one? Forensic facial reconstruction using scans of skeletal remains allows researchers to create 3D models of the face through a combination of science, history, and artistic interpretation. The results may be somewhat subjective, but they’re fascinating anyway. Here are nine facial reconstructions of famous people.

1. Richard III

In 2012, King Richard III’s skeleton was found below a parking lot in Leicester, England, where in 1485 he was hurriedly buried after dying in battle. A reconstruction (above) shows a young man, only 32 years old, with a gentle, approachable face. It’s a far cry from the child-murdering villain portrayed by Shakespeare and other writers. One thing they said does seem accurate, however: The skeleton had a curved spine from scoliosis, suggesting that Richard’s humpback may have been real.

2. Bach

J.S. Bach’s bust has sat on innumerable pianos for centuries, but he only posed for one portrait in his lifetime. So this reconstruction of his face—which was taken from a bronze cast of his skull—offers an interesting glimpse into the man beneath the 18th century wig. You get the same thick neck, underbite, and stern brow you see in the painting, but the reconstruction’s friendly, confused stare lacks the soul of the real man … and his music, for that matter.

3. Shakespeare

Apparently, no one knows anything about Shakespeare for sure—his hair color, his sexual orientation, how he spelled his name, whether he liked his wife, etc. Some people aren’t even sure whether he wrote his plays or not. So this rendering, taken from a death mask found in Germany, is bound to be controversial. But if it is Shakespeare, it’s pretty intriguing. It shows a man who suffered from cancer and had a sad, soulful face.

4. Dante

Maybe it’s because The Divine Comedy dealt with the ugliness of sin that Dante Alighieri is usually depicted as unattractive, with a pointy chin, buggy eyes, and enormous hooked nose. But a reconstruction done from measurements of the skull taken in 1921—the only time the remains have been out of the crypt—reveals a much more attractive Dante. The face has a rounder chin, pleasant eyes, and smaller nose than previously thought. It’s a face with character.

5. King Henri IV

The mummified head of France’s King Henri IV was lost after the French Revolution until a few years ago, when it showed up in a tax collector’s attic. In his day, Henri was beloved by everyone except the Catholic fundamentalists who murdered him in 1610. The hard-living king looks a bit old for his 56 years, but there’s a twinkle in his eyes. What the model cannot show, however, was how much the king stank—apparently he smelled of ”garlic, feet and armpits.”

6. Cleopatra’s Sister

Cleopatra hated her half-sister Arsinoe IV so much she had her dragged out of the temple of Artemis and murdered. In 2013, researchers said they had discovered what may be Arisone’s body, based on the shape of the tomb, carbon dating, and other factors. The resulting facial reconstruction shows a petite teenager of European and African blood. And yeah, maybe this is closer to what Arsinoe would look like if she were trapped in The Sims, but since Cleopatra’s remains are long gone, this may be the closest we get to knowing what she looked like.

7. King Tut

King Tutankhamun, whose famous sarcophagus has traveled far more than the “boy king” did in his 19-year lifetime, had buckteeth, a receding chin, and a slim nose, according to 3D renderings of his mummy. His weird skull shape is just within range of normal and was probably genetic—his father, Akhenaten, had a similarly shaped head. Tut’s body also had a broken leg, indicating he may have died from falling off a horse or chariot.

8. Copernicus

Nicolaus Copernicus, who challenged the belief that the sun revolved around the earth, died in 1543 at age 70. When his body was found in 2006 in a Polish church and confirmed by matching DNA to strands of his hair left in a book, the Polish police used their forensic laboratory to make this portrait. They made sure to include Copernicus’s broken nose and the scar above his left eye. Who knew that the Father of Astronomy looked so much like the actor James Cromwell?

9. Santa Claus

The remains of St. Nicholas, i.e. Santa Claus, have been in a church in Bari, Italy, since they were stolen from Turkey in 1087. This reproduction, taken from measurements of his skull, reveal that St. Nicholas had a small body—he was only 5’6”—and a huge, masculine head, with a square jaw and strong muscles in the neck. He also had a broken nose, like someone had beaten him up. This is consistent with accounts of St. Nicholas from the time: It turns out that Santa Claus had quite a temper.

A version of this list was first published in 2013.

11 Fun Facts About Them!

Joan Weldon and James Arness star in Them! (1954).
Joan Weldon and James Arness star in Them! (1954).
Warner Home Video

In the 1950s, Elvis was king, hula hooping was all the rage, and movie screens across America were overrun with giant arthropods. Back then, Tarantula (1955), The Deadly Mantis (1957), and other “big bug” films starring colossal insects or arachnids enjoyed a surprising amount of popularity. What kicked off this creepy-crawly craze? An eerie blockbuster whose impossible premise reflected widespread anxieties about the emerging atomic age. Grab a Geiger counter and let’s explore 1954's Them!.

1. Them!'s primary scriptwriter once worked for General Douglas MacArthur.

When World War II broke out, the knowledge Ted Sherdeman had gained from his career as a radio producer was put to good use by Uncle Sam, landing him a position as a radio communications advisor to General MacArthur. However, the fiery conclusion of the war left Sherdeman with a lifelong disdain for nuclear weapons. In an interview he revealed that upon hearing about the 1945 bombing of Hiroshima, he “just went over to the curb and started to throw up."

Shifting his focus from radio to motion pictures, Sherdeman later joined Warned Bros. as a staff producer. One day he was given a screenplay that really made his eyes bug out. George Worthing Yates, best known for his work on the Lone Ranger serials, had decided to take a stab at science fiction and penned an original script about giant, irradiated ants attacking New York City. "The idea appealed to me very much,” Sherdeman told Cinefantastique, "because, aside from man, ants are the only creatures in the world that plan to wage war, and nobody trusted the atomic bomb at that time.” (His statement about animal combat is debatable: chimpanzee gangs will also take organized, warlike measures in order to annex their rivals’ territories.)

Although he loved the basic concept, Sherdeman felt that the script needed something more. Screenwriter Russell S. Hughes was asked to punch up the script, but died of a heart attack after completing the first 50 pages. With some help from director Gordon Douglas, Sherdeman took it upon himself to finish the screenplay. Thus, Them! was born.

2. Two main ants were built for the movie.

Them! brought its spineless villains to life using a combination of animatronics and puppetry, courtesy of an effects artist by the name of Dick Smith. He constructed two fully functional mechanical ants for the production, with the first of these being a 12-foot monster filled with gears, levers, motors, and pulleys. Operating the big bug was a job that required a small army of technicians who’d pull sophisticated cables to control the ant’s limbs off-camera. These guys worked in close proximity and often crashed into each other as a result, prompting Douglas to call them “a comedy team.”

The big insect mainly appears in long shots, and for close-ups, Smith built the front three quarters of a second large-scale ant and mounted it onto a camera crane. During scenes that required swarms of ants, smaller, non-motorized models were used. Blowing wind machines moved the little units’ heads around in a lifelike manner.

3. Them! features the Wilhelm Scream.

Fifty-nine minutes in, the ants board a ship and one of them grabs a sailor, who unleashes the so-called "Wilhelm Scream." You can also hear it when James Whitmore’s character is killed, and the sound bite rings out once again during the movie’s climax. Them! was among the first movies to reuse this distinctive holler, which was originally recorded three years earlier for the 1951 western Distant Drums. Since then, it’s become something of an inside joke for sound recording specialists. The scream has appeared in Titanic (1997), Toy Story (1995), Reservoir Dogs (1992), Batman Returns (1992), the Star Wars saga (1977-present), all three The Lord of the Rings movies (2001-2003), and countless other films.

4. Leonard Nimoy makes an appearance.

In one brief scene, future Star Trek star Leonard Nimoy plays an Army man who receives a message about an alleged “ant-shaped UFO” sighting over Texas. He then proceeds to poke fun at the Lone Star State, because, as everybody knows, insectile space vessels are highly illogical.

5. Many different sounds were combined to produce the screeching ant cries.

Throughout the movie, the monsters announce their presence with a haunting wail. Douglas’s team created this unforgettable shriek by mixing assorted noises, including bird whistles, which were artificially pitched up by sound technicians.

6. Sandy Descher had to sniff a mystery liquid during her signature scene.

Like Steven Spielberg’s Jaws, Them! has a deliberate pace and the massive insects don’t make an onscreen appearance until the half hour mark. Douglas took credit for this restrained approach, saying, “I told Ted, let’s tease [the audience] a little bit before you see the ant. Let’s build up to it."

So instead of showing off the big bugs, the opening scene follows a little girl as she wanders through the New Mexican desert, listlessly clutching her favorite doll. That stunning performance was delivered by child actress Sandy Descher. Later, in one of the most effective title drop scenes ever orchestrated, a vial of formic acid is held under her character’s nose. Suddenly recognizing the aroma, the traumatized youngster screams “Them! Them!” Descher never found out what sort of liquid was really sloshing around in that container.

“They used something that did smell quite strange. It wasn’t ammonia, it was something else,” she told an interviewer. Still, the mysterious brew had a beneficial effect on her performance. “They tried to create something different and it helped me a lot with that particular scene,” Descher said.

7. Them! was originally going to be filmed in 3D and in color.

To hear Douglas tell it, the insect models looked a lot scarier in person. “I put green and red soap bubbles in the eyes,” he once stated. “The ants were purple, slimy things. Their bodies were wet down with Vaseline. They scared the bejeezus out of you.” For better or for worse, though, audiences never got the chance to savor the bugs’ color scheme.

At first, Warner Bros. had planned on shooting the movie in color. Furthermore, to help Them! compete with Universal’s brand-new, three-dimensional monster movie, Creature From the Black Lagoon, the studio strongly considered using 3D cameras. But in the end, the higher-ups at Warner Bros. didn’t supply Douglas with the money he’d need to shoot it in this manner. Shortly before production started on Them!, the budget was greatly reduced, forcing the use of two-dimensional, black and white film.

8. The setting of the climactic scene was changes—twice.

Yates envisioned the final battle playing out in New York City’s world-famous subway tunnels. Hughes moved the action westward, conjuring up an epic showdown between human soldiers and the last surviving ants at a Santa Monica amusement park. Finally, for both artistic and budgetary reasons, Sherdeman set the big finale in the sewers of Los Angeles.

9. Warner Bros. encouraged theaters to use Them! as a military recruitment tool.

The film’s official pressbook advised theater managers who were screening Them!& to contact their nearest Armed Forces recruitment offices. “Since civil defense in the face of an emergency figures in the picture, make the most of it by inviting [a] local agency to set up a recruiting booth in the lobby,” the filmmakers advised. Also, the document suggested that movie houses post signs reading: “What would you do if (name of city) were attacked by THEM?! Prepare for any danger by enlisting in Civil Defense today!”

10. The movie was a surprise hit.

Studio head Jack L. Warner predicted that Them!, with its far-fetched plot, wouldn’t fare well at the box office. So imagine his surprise when it raked in more than $2.2 million—enough to make the picture one of the studio's highest-grossing films of 1954.

11. Them! landed Fess Parker the role of TV's Davy Crockett.

When Walt Disney went to see Them!, he had a specific objective in mind: Scout a potential Davy Crockett. At the time, Disney was developing a new television series that would chronicle the life and times of the iconic frontiersman, and James Arness, who plays an FBI agent in Them!, was on the short list of candidates for the role. Yet as the sci-fi thriller unfolded, it was actor Fess Parker who grabbed Disney’s attention. Director Gordon Douglas had hired Parker to portray the pilot who ends up in a psych ward after an aerial encounter with a gargantuan flying ant. And while his character only appears in one scene, the performance impressed Disney so much that the struggling actor was soon cast as Crockett.

By the Texan’s own admission, his good fortune may’ve been the product of bargain hunting. “Walt probably asked, ‘How much would Arness cost?’ and then ‘This fellow [Parker], we ought to be able to get him real economical,” Parker once said.

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