1

Anchisaurus

Image: Simon Infanger

Anchisaurus is one of the first dinosaurs discovered in American territory, although it was not correctly identified at the beginning. The first fossil of this herbivore was found in East Windsor, Connecticut , in 1818, but it was then believed to be part of a human skeleton. In subsequent years, other specimens of this species were uncovered in the area.

It measured 8 to 20 ft in length and lived 210 million years ago in the Portland Formation, Northeastern United States. In the late Triassic and early Jurassic periods, the Connecticut Valley was a dry, steep depression, and it was possible to pass from here to the east and the center of what is now Africa. This explains why some dinosaurs lived both in America and other continents.

2

Triceratops

Image: photo_steff

One of the most iconic dinosaurs found in America is the Triceratops, a herbivore that lived 70 to 65 million years ago, right at the end of the Age of Dinosaurs, in the Late Cretaceous. Its name derives from Greek and means "face with three horns". One of the largest horned dinosaurs**,** it stood around 7.5 ft tall and weighed about 5 rhinoceroses, the equivalent of 10 tons.

Fossils of this dinosaur have been found in abundance in the Hell Creek Formation in Montana and South Dakota. No fossils of this dinosaur have been found on any other continent. Triceratops has been the state dinosaur of Wyoming since March 1994.

3

Allosaurus

Image: WikiImages

Allosaurus was one of the largest carnivores of the Jurassic period and its remains in the United States have been found mainly in the Morrison Formation, which covers states such as Colorado, Utah, and Wyoming. It lived 155 to 145 million years ago in North America, Africa, Australia, and possibly China. Also, did you know that the Allosaurus fragilis is the state fossil of Utah?

This bipedal dinosaur was an agile hunter with powerful jaws and sharp teeth. It was a theropod, not as huge as the largest carnivore, Tyrannosaurus rex, but just as fearsome. Allosaurus was bigger than an elephant and heavier than a rhino. Its name means "different lizard" due to its rare concave vertebrae.

4

Stegosaurus

Image: ariesa66

Another inhabitant of the Morrison Formation was the Stegosaurus, famous for its dorsal plates and spines on its tail, which it used for defense. Stegosaurus used to walk on all fours, grazing on low vegetation. Its head was perfectly adapted to this way of feeding. It was first described in 1877 by Yale paleontologist Othniel Charles Marsh, and its name means "roof(ed) lizard".

This Jurassic herbivore has been discovered in several states in the western United States. Scientists have found many fossils, showing that it was a very common creature for 10 million years, despite its tiny brain, small head, and useless teeth. The discovery of the Stegosaurus has helped them better understand the anatomy and behavior of armored dinosaurs.

5

Tyrannosaurus rex

Image: Elly Enn

Is Tyrannosaurus rex the most famous dinosaur on the planet? Portrayed by pop culture to the hilt, this formidable predator is known for its gigantic size, razor-sharp teeth, and bipedal posture. However, its popularity has a logical explanation. T. rex is also one of the best-represented dinosaurs in the fossil record, with several complete specimens discovered, particularly in the states of Montana, South Dakota, and Wyoming.

Based on bones found in the late 19th century, paleontologist Henry Fairfield Osborn recreated the first drawing of this gigantic creature. He named it Tyrannosaurus rex, meaning "tyrant lizard king," because it is believed to have been the most dangerous dinosaur and the largest land carnivore of all time. Although it is estimated that up to 1.7 billion T. rex dinosaurs lived on Earth, only about 30 nearly complete skeletons have been found. Think about that!

6

Deinonychus

Image: Steve Wrzeszczynski

This small but ferocious theropod lived during the Cretaceous period about 115-108 million years ago. Deinonychus is known for its sickle-shaped claws on its feet, used for hunting. Its name, unsurprisingly, means "terrible claw". Like all bipeds, it moved only on its hind legs and is believed to have been able to run at 25 miles per hour: more than the average Olympic champion.

Deinonychus fossils were found in Utah, Oklahoma, Montana, and Wyoming, in rocks of the Cloverly Formation and Antlers Formation. The study of this species, beginning in the 1960s, revolutionized the way scientists thought about dinosaurs, providing fascinating new insight into smaller predators.

7

Ankylosaurus

Image: mdherren

Ankylosaurus is one of the best-known armored dinosaurs, which lived at the end of the Cretaceous period. It had bony protrusions on its head and all over its body as protection against the teeth and claws of predators. The armor was made up of small plates of bone welded together, constituting a shell as effective as that of turtles.

This gigantic herbivore roamed the jungles of North America about 68-66 million years ago, almost as well protected as a modern tank. The first specimen of Ankylosaurus was found in 1906 in the Hell Creek Formation, near Gilbert Creek, Montana. Other fossils of this species were discovered in other parts of Montana and Alberta, Canada, in the following years. However, to this day, it has not been possible to obtain a complete skeleton.

8

Hadrosaurus

Image: Jordyn St. John

The first Hadrosaurus fossils were discovered by William Parker Folke, an amateur paleontologist, in 1838 in Haddonfield, New Jersey. The excavation site, known as the Hadrosaurus foulkii Leidy site, is now a National Historic Landmark. Hadrosaurids are known for their duck-billed mouth, with a powerful jaw containing several rows of teeth for chewing all kinds of leaves.

In 2004, scientists found a mummified Hadrosaurus specimen in North Dakota. This fossil is extremely unusual and valuable, as dinosaur soft tissue including skin and muscle is rare. This find allows us to learn more about this species and how they lived 67 million years ago.

9

Diplodocus

Image: michaelwedermann

Diplodocus means "double beam" and is so named because of the double bones in its tail. This was one of the longest animals on earth. It was about 79-85 ft long, 15 ft high, and weighed 15 tons. It could reach the tops of towering trees for food, and its small head allowed it to forage in vegetation where few other dinosaurs could reach.

Although some Diplodocus fossils were discovered earlier near Cañon City, Colorado, the most notable find came a few years later. In 1899, Funded by Scottish-American steel tycoon Andrew Carnegie, members of the Carnegie Museum of Natural History found a well-preserved Diplodocus skeleton in the Morrison Formation of Sheep Creek, Wyoming. With these fossils, the museum created a composite mount that became very popular and even got to tour the world.

10

Apatosaurus

Image: Cup of Couple

Apatosaurus is one of the best-known sauropods that inhabited North America during the Jurassic period. These herbivorous giants, with their long necks and tails, have also been discovered in the Morrison Formation, mainly in Colorado and Utah. It is believed to have lived 150 million years ago, at the end of the Jurassic period.

Apatosaurus could reach 69-75 ft in length, 20 tons in weight, and was one of the largest sauropods. It had a long neck containing 15 huge bones supported by powerful muscles that allowed it to feed on the leaves of the tallest trees. Perhaps this dinosaur sounds familiar. It has been the inspiration for numerous beloved animated characters: Littlefoot from The Land Before Time and Arlo and Poppa Henry from Pixar's The Good Dinosaur are Apatosauruses.

1

More Jaws

Image: Karen Zhang

One early idea for the Jaws ending involved not one shark, but several . After the first was killed, Brody would’ve seen more fins approaching , hinting the threat wasn’t over.

Another scrapped version, closer to the novel, had the shark drift away after being harpooned, leaving Brody alone at sea. Both endings were dropped in favor of the explosive finale we know today.

2

Titanic’s Jack & Rose

Image: Edwin Petrus

Claire Danes, best known at the time for Romeo + Juliet , turned down the role of Rose in _Titanic_—and says she has "no regrets" today. It’s tough to picture anyone but Kate Winslet in that part.

Matthew McConaughey also came close to playing Jack. He was confident he had the role, but Leonardo DiCaprio ultimately got it.

3

Psycho, in Technicolor

Image: Maxime Roedel

These days, many assume Alfred Hitchcock shot Psycho in black and white for artistic or symbolic reasons. It turns out that it was just a budget issue .

Paramount found the concept too "distasteful," so Hitchcock financed the film himself. Despite its now-legendary status, the studio initially gave it only a limited release.

4

When Harry Almost Didn’t Meet Sally

Image: Nur Fadhillah Fajarudeen

Director Rob Reiner began When Harry Met Sally after his divorce, feeling cynical about love. Originally, the film was written so that Harry and Sally would remain just friends.

But during production, Reiner fell in love again—and changed his mind. The ending was rewritten so the two characters end up together , giving the rom-com its iconic, heartwarming finish.

5

Saturday Night Gump

Image: Yosuke Ota

Believe it or not, John Travolta was originally offered the role of Forrest Gump —but he turned it down, and the part went to Tom Hanks instead.

Still, Travolta went on to star in Pulp Fiction , which became a huge hit, so in the end, it worked out for everyone.

6

Pretty Sad Woman

Image: Krists Luhaers

The original Pretty Woman script—titled _3000_—was a dark drama about sex work, ending with Edward leaving Vivian. It had little romance or humor and was meant to serve as a cautionary tale.

Al Pacino and Michelle Pfeiffer once auditioned, but things changed after Julia Roberts and Richard Gere were cast. Their charm shifted the tone, and rewrites led to the romantic ending we know today.

7

The Slaptrix

Image: Markus Spiske

Will Smith was originally offered the role of Neo but turned it down. He has since praised Keanu Reeves’s performance in The Matrix and admitted he would have ruined the film.

Smith's a great actor, but it's tough to picture anyone but Reeves as Neo, dodging bullets in slow motion.

8

Fatal Attraction

Image: Pawel Janiak

Screenwriter James Dearden disliked the altered ending to Fatal Attraction . Originally, Alex framed Dan for her murder, but test audiences didn’t like it .

As a result, the team reshot the film’s climax, giving Alex a more conclusive fate. The new version offered clearer consequences and closure, making it far more satisfying for viewers.

9

Ghost Smashers

Image: Viktor Forgacs

Dan Aykroyd’s original Ghostbusters concept—called _Ghost Smashers_—was a wild sci-fi adventure involving time travel and dimension-hopping .

Filmmakers simplified the story, shifting the focus to ghost-catching instead. That change transformed it into the hilarious, iconic classic we know today.

10

No Marty McFly

Image: Roger Ce

Eric Stoltz was originally cast as Marty McFly in Back to the Future, and even filmed several scenes. However, director Robert Zemeckis and producer Steven Spielberg felt that Stoltz didn’t embody the comedic, fun-loving spirit they were looking for.

As a result, Michael J. Fox was brought in to play the iconic Marty—and the rest is history. It’s hard to imagine the film without Fox’s perfect balance of humor and charm.

11

No Michael Corleone

Image: Enrique Bancalari

Al Pacino nearly missed out on playing Michael Corleone in The Godfather . Director Francis Ford Coppola had doubts about Pacino’s fit for the powerful role, and stars like Jack Nicholson and Robert Redford were also considered .

Luckily, Pacino was cast, and his intense, layered performance became iconic. His portrayal added depth that helped make the film a lasting classic.

12

Gone With No Lead Actress

Image: micheile henderson

Gone With the Wind began filming without a lead actress, and Clark Gable was reportedly less than thrilled when Vivien Leigh was finally cast as Scarlett O’Hara.

The production faced creative clashes, including pushback on the film’s tone and even Rhett Butler’s famous line. Fortunately , "Frankly, my dear, I don’t give a damn" stayed in .

1

X-Men (2000)

Remember the scene when Magneto and Professor X play a tense, symbolic game of chess? Well, the actors certainly do. Here’s why: Neither Patrick Stewart nor Ian McKellen knew how to play chess before filming.

So, director Bryan Singer brought in a Canadian chess Grandmaster to help design the game the two men would share by choreographing each piece's movement based on the high-strung dialogue they were having —Professor X needed to win.

2

E.T. the Extra-Terrestrial (1982)

Did you know that E.T., the beloved extraterrestrial who wanted to phone home, was intentionally designed to have no specified gender ?

Director Steven Spielberg expressed that his intention was to define E.T. as a "plant-like" creature, neither male nor female, and that this was explicitly explained in earlier versions of the script.

However, in the film, young Elliott insists that he knows the gender of his newfound friend: "He’s a boy," he explains to his sister when she asks. The audience went along with Elliott’s interpretation, and hence E.T. is considered to be male.

3

How the Grinch Stole Christmas (2000)

Jim Carrey loathed the process of becoming The Grinch. Though the Dr. Seuss character was fun to play, sitting for hours and hours for makeup and costume until the green look was perfected, he said, was exhausting.

So, he was shocked one day when he arrived on set, only to find yet another Grinch ready there before him. It was none other than director Ron Howard, who had been up since 3:30 am, getting into full costume in solidarity with him.

4

The Nightmare Before Christmas (1993)

Watching Tim Burton’s The Nightmare Before Christmas, one might take for granted that the stop-motion marvel took years of painstaking effort. Around 227 puppets were built for the production because each character had multiple duplicates to allow shooting on many sets simultaneously.

The protagonist Jack Skellington alone needed nearly 400 different heads to capture enough facial expressions.

5

Toy Story (1995)

Even though we all recognize Woody the Cowboy, there was a time when the leading character of Toy Story was going to be… quite different.

Sheriff Woody was at first conceived as a ventriloquist dummy . But the Pixar creators thought that a softer cowboy toy would be a little bit friendlier. What do you think?

6

Star Wars: A New Hope (1977)

We all know the loyal little robot of the Star Wars world. But R2-D2’s name came about unintentionally. While filming a previous film, George Lucas had liked an abbreviation he heard his sound editor shout one day: "R2, D2".

It referred to "Reel 2, Dialogue Track 2" . But the expression sparked Lucas’s imagination.

7

Home Alone (1990)

Yes, Kevin is nine years old in the movie. But most of his "dangerous" moments were handled by a 30-year-old stuntman in kid-sized clothes!

Still, some injuries were inevitable. And they didn’t come from hanging from a zipline or sliding downstairs: No, young Macauley Culkin got a scar from Joe Pesci accidentally biting his fingers too hard in one scene.

8

Interstellar (2014)

Christopher Nolan’s Interstellar is well known for its ambitious science fiction vision. But Nolan went above and beyond with details. For example, the robot TARS wasn’t a CGI creation: it was physically built (a kind of "puppet-robot").

Plus, the space suits the actors wore were designed with functioning oxygen units and cooling tubes! Needless to say, though, all scenes were filmed on Earth.

9

The Matrix (1999)

Did you know that Johnny Depp was the first choice to play Neo for The Matrix ? As an up-and-coming actor in the 90s, the writers had considered him perfect for the role. However, fate decided Keanu Reeves would take the part, and the rest was history.

Reeves didn’t have it easy, though: the Wachowskis had him read philosophical books like Simulacra and Simulation by Jean Baudrillard, Out of Control by Kevin Kelly, and Introducing Evolutionary Psychology by Dylan Evans.

10

Scarface (1983)

After Martin Scorsese saw Brian De Palma’s Scarface, he reportedly told actor Steven Bauer: "It’s great… but they’re going to hate it ."

He wasn’t wrong. Critics did hate it, at first. They called it vulgar, excessive, hysterical, and violent. Scorsese himself had been criticized for the violence in his own work, so he recognized the pattern instantly. However, as we know, audiences eventually made it a cult classic.