General General 6 min read

Fossil treasures

10 jaw-dropping dinosaurs discovered in America

Image: Fausto García-Menéndez

The territory of the United States is a real goldmine for paleontologists. Over the years, some of the most impressive and well-preserved dinosaur fossils in the world have been discovered in our country. From the likable Apatosaurus to the fearsome Tyrannosaurus rex, the finds have provided a fascinating glimpse into prehistoric life. Read on to learn about the 10 most famous and influential American dinosaurs.

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.

General General 5 min read

Dusting off some old memories

Playground love: 12 outdoor games everyone played as a child

Image: cottonbro studio

Playing outdoors is one of the most enjoyable and memorable experiences of childhood. Our childhoods didn’t require modern technology to feel complete or entertaining. We could spend hours at the park or during school breaks playing tag, jumping rope, or hiding for our friends to find us. Do you remember these games? If you’d like to jog your memory, read on to revisit the games you played most as a kid!

1
Hopscotch

Image: MOHAMMADREZA Kr

When we were kids, before computer games and smartphones, we didn’t need much to keep us entertained in the afternoons. Playing hopscotch, for example, required only a piece of chalk and a large enough asphalt area to draw on and jump around.

There are numerous variations, but children have played hopscotch for centuries . The basic principle remains the same: a series of numbered rectangles is outlined on the ground, and the player tosses a pebble into each one in turn. The player then hops through the course without touching the lines, picking up the pebble along the way, and returns—still hopping—to the starting point.

2
Tag

Image: Aleksandar Andreev

Tag is undoubtedly the most famous chasing and catching game of all time. It also serves as the foundation for many other games. This is no coincidence—tag has existed since ancient times, with different versions in civilizations as dissimilar as Greece and India.

In the simplest form of tag, one player tries to tap another player; the tagged player then becomes "it —a.k.a. "the chaser"—and it all starts all over again. Which version was your favorite? Ours was freeze tag!

3
Jump-rope and Double Dutch

Image: cottonbro studio

Jumping rope was another childhood favorite, whether on street corners or in school playgrounds. Whether alone or in a group, it kept us entertained for hours. Among the countless variations, Double Dutch—a version in which one or more players jump between two long ropes turning in opposite directions—was probably the most fun and most challenging of all.

The origin of Double Dutch is not entirely clear. Some claim Dutch settlers brought it to America, while others argue it was invented in the early 1900s in the U.S. What is certain is that this game, which combines motor skill training and physical exercise , became so popular that it evolved into a competitive sport with worldwide tournaments.

4
Simon says

Image: Arthur Krijgsman

"Simon says… touch your nose!" Remember these commands? As kids, we could spend hours playing this game, where one player took on the role of "Simon" and gave instructions that the rest of us had to follow to the letter.

Records of this game’s existence in the United States date back to the mid-19th century ; however, its origins may be traced back to ancient Rome. Some historians suggest that the name Simon comes from Simon de Montfort, a 13th-century French-English nobleman who was known for his ability to command authority over his subjects.

5
Hide-and-seek

Image: Annie Spratt

Hide-and-seek is one of the simplest games but, at the same time, one of the most fun when we were children. In this game, one player would close their eyes and count to a certain number while the others searched for a place to hide. The challenge was to find as many hidden players as possible before they reached "home base."

Hide-and-seek, which has different variants worldwide, has been played since ancient times. In fact, historians have discovered a strikingly similar game in ancient Greece called apodidraskinda , which followed rules much like the ones we know today.

6
Hula Hoop contest

Image: Annie Spratt

The hula hoop became popular in the late 1950s when the American toy company Wham-O introduced a plastic version to the market. However, hula hoops have been used by children since ancient times. Over the centuries, they have been made from a variety of materials, including willow, grapevines, rattan, stiff grasses, wood, and metal.

Growing up, most schools had hula hoops available during PE classes. It was the ideal game for young children to have fun and get fit at the same time. Teachers often organized contests in which players twirled the hula hoop around their waist for as long as possible. The winner was the one who kept the hoop spinning the longest before it dropped to the floor.

7
Marco Polo

Image: Library of Congress

This game, which shares its name with the 13th-century Italian explorer, was a summer-exclusive tradition we eagerly anticipated all year long. Many of us still vividly remember our friends, siblings, and cousins shouting "Marco!" and responding "Polo!" as kids.

Played in a swimming pool, Marco Polo is a location-based game in which players must find each other using auditory clues. It became popular in America in the 1960s and is now played worldwide with various adaptations.

8
Musical statues

Image: Robert Collins

Musical Statues, also known as Freeze Dance, is a variation of Musical Chairs that can be played outdoors. It was a popular game at birthday parties and involved running around while music played. When the music stopped, players had to freeze in place. Anyone who moved was instantly out, and the last one remaining won the game.

Musical Statues originated in the United Kingdom, likely in the mid-1950s , when music players became more common in people's homes.

9
Tug of war

Image: RDNE Stock project

Did you know that before the 19th century, the game we now call tug of war was known as French and English ? Tug of war—or rope pulling—is an ancient game , with different versions found in Egypt, Greece, India, China, and Cambodia.

In tug of war, two teams compete in a test of strength and strategy, pulling a rope in opposite directions. Though this game is popular at school events for its mix of teamwork, exercise, and friendly competition, it was once an official sport . In fact, from 1900 to 1920, tug of war was part of the Olympic Games.

10
Dodgeball

Image: Wan San Yip

Dodgeball is another game we used to play in school that is now also considered a sport . In this game, the objective is to eliminate all members of the opposing team by hitting them with thrown balls.

Though it’s now a fun and friendly game, that wasn’t always the case. Dodgeball originated in Africa approximately two hundred years ago. Back then, it was much more dangerous and violent. Instead of using soft balls, participants threw rocks found in nature. Fortunately, in the mid-19th century, an English missionary saw the game and transformed it into a more enjoyable, non-life-threatening activity.

11
Duck, duck, goose!

Image: Kampus Production

You probably haven’t played this game since preschool or kindergarten, and you might have even forgotten about it completely. However, it was one of the most popular games on the playground .

In this traditional children's game, participants sit in a circle, and one is chosen to touch the heads of the others. The player who is "it" goes around saying "duck" until they choose someone and say "goose." Then the chase begins!

12
Scavenger hunt

Image: Nellie Adamyan

This was a more complex game that required much more development and preparation time. But perhaps because of that, it was so appealing to us. Scavenger hunts were so much fun that we still play them as adults, and they remain a popular activity at some universities , for example.

This game, which involves finding specific items from a list, evolved from ancient folk games. The modern version we play today, however, was popularized by American gossip columnist and socialite Elsa Maxwell in New York City during the 1930s .

General General 6 min read

12 American inventions that shaped modern life

Image: National Gallery of Art, CC0, via Wikimedia Commons

From life-saving medical developments to groundbreaking technologies, American inventors have transformed how we live, work, and communicate. These innovations not only transformed everyday life but also ignited the flame of progress across the globe. Let’s dive into our selection of the 12 inventions that best reflect American creativity and ingenuity.

1
The light bulb

Image: Zach Lucero

Delivering electricity to the masses was one of the greatest technological advances in human history. The mid-1800s saw great competition in this area, as inventors around the world raced to invent their own electric light. The first filament bulb was developed by British inventor Warren de la Rue in 1840, but his use of a platinum filament made it expensive and impractical.

A few years later, Joseph Swan in the UK and Thomas Edison in the US each independently invented bulbs using cheaper elements. However, Edison received a patent on his bulb in early 1880, slightly before Swan. The light bulb, an invention that quickly reached every home, revolutionized life around the world, led to the development of the electrical grid, and set the stage for our modern electricity-dependent society.

2
The telephone

Image: viarami

In this modern era of emails and text messages, it can be hard to appreciate that the telephone was once revolutionary. The telegraph, the phone’s predecessor, only transmitted brief written messages. The telephone, however, allowed people to speak with one another in real time over long distances.

Inventor, scientist, and engineer Alexander Graham Bell invented the electric telephone in 1876. Although Bell was Scottish-born and also lived in Canada, he patented his invention in the US . The telephone was a game-changing technology that improved business efficiency, enabled instant global connections, and allowed emergencies to be reported as they occurred. It effectively made the world more connected and faster-paced.

3
The fire escape

Image: Lewis J Goetz

When we think of US inventions, the first things that come to mind are usually the light bulb or the telephone. But did you know that the modern fire escape was also a US innovation? Designed in 1887, this simple yet life-saving invention changed building safety forever.

In the late 1800s, fires were devastating cities across America. One woman, Anna Connelly, saw this horror up close and decided to do something about it. She designed an external iron staircase system, and in 1887, she patented it. At a time when women couldn’t even vote, Anna’s invention became a safety standard in most major cities, saving thousands of lives. Today her name is barely known, but next time you see a fire escape, remember the woman who made them possible.

4
The cash register

Image: Di Du

The first mechanical cash register for calculating and recording sales transactions was invented by saloonkeeper James Ritty following the American Civil War. He was looking for a way to stop cashiers from stealing, and finally patented his novel invention in 1879.

When a transaction was completed, Ritty's Incorruptible Cashier made a bell sound, and the amount was displayed on a large dial on the front of the machine. During each sale, a paper tape was hole-punched so the vendor could keep track of sales. Pretty ingenious, don’t you think?

5
Interchangeable parts

Image: gayulo

Standardized interchangeable parts for machines are now a staple of modern manufacturing, but it’s not a new idea. There’s evidence that thousands of years ago, ancient Carthage used them to build warships, and ancient China applied the idea to crossbows. Many centuries later, French experimentation with interchangeable musket parts inspired Thomas Jefferson.

In 1798, President George Washington and his Congress finally agreed to Jefferson’s idea of implementing the technology in America. They awarded a contract to Eli Whitney—the inventor of the cotton gin—to supply the government with 20,000 muskets. Whitney recognized the potential of developing firearms with identical parts and mechanisms. His advancements in interchangeable parts laid the foundation for modern manufacturing, enabling improved quality control, reduced costs, and faster production of goods.

6
The assembly line

Image: Public domain, via Wikimedia Commons

For most of human history, manufactured goods were custom-made. Every model of a machine, piece of clothing, or tool was unique. The development of interchangeable parts was a huge advancement, but automobile manufacturer Ransom Olds took it a step further with the assembly line in 1901. By standardizing and automating many aspects of manufacturing, uniform goods could be created faster and at lower costs.

Olds’ vehicle, the Oldsmobile Curved Dash, became the first mass-produced car . His method was later adopted and perfected by Henry Ford, whose moving assembly line for the Model T in 1913 revolutionized manufacturing. Today, the assembly line combines human labor and automation to produce nearly every mass-market product on Earth. Many experts agree it was one of the most significant technological developments of the 20th century.

7
The airplane

Image: Wright Brothers, Public domain, via Wikimedia Commons

People have always observed birds and insects and dreamed of flying. The Greeks told the story of Icarus and Daedalus, who crafted wings of wax and feathers; Leonardo da Vinci sketched and theorized flying machines, but it wasn’t until 1903 that the airplane became a reality in Kitty Hawk, North Carolina.

Wilbur and Orville Wright experimented with aeronautics for several years before achieving their successful first flight. A few years later, airplanes were first used in warfare. Within seven decades, their technology evolved and took us to the Moon. Today, the airplane is an indispensable technology that allows us to transport goods and people around the world in no time.

8
GPS

Image: Stanislav Kondratiev

It’s hard to imagine life without GPS—but do you know how it began? When the Soviet Union launched Sputnik in 1957, American physicists realized they could track the satellite’s radio transmissions using the Doppler effect.

Soon after, the U.S. military began testing and launching the Navstar Global Positioning System satellites. In 1983, President Ronald Reagan approved GPS for civilian use, and by the start of the 21st century, GPS devices were widely available in vehicles and mobile phones . Today, GPS is an essential technology for business, travel, and military operations.

9
Personal computers

Image: Unidentified U.S. Army photographer, Public domain, via Wikimedia Commons

The first electronic general-purpose computer, ENIAC, was built in 1946 at the University of Pennsylvania. It occupied 1,800 square feet of floor space and weighed 30 tons. At the time, imagining a consumer-grade computer small enough to fit in every home would have seemed impossible. Yet, just one generation later, the impossible became reality.

Over the years, computers became smaller, cheaper, and more powerful than the ENIAC’s creators could have imagined. In 1971, John Blankenbaker developed the first PC, the Kenbak-1. Fifty years later, it is clear that personal computing has fundamentally shaped the modern world.

10
The internet

Image: Lorenzo Herrera

Revolutionary technologies such as the wheel, the internal combustion engine, the telephone, and the airplane have forever changed the way we travel and communicate. The internet is no exception; it gives people access to the entirety of human existence with just a few clicks.

In 1969, computer scientists at the Advanced Research Projects Agency (ARPA) created the first network connecting labs at UCLA and Stanford. Over time, their network expanded, connecting anyone with a device. Since then, the internet has revolutionized the way human beings access resources and share information.

11
E-mail

Image: Brett Jordan

After the personal computer and the Internet, we only needed to invent a modern method of sending messages and letters to each other. The Advanced Research Projects Agency Network, known as ARPANET, sent the first email in 1971. Within five years, the majority of exchanges within the ARPANET community were via email.

With the introduction of attachments in the early 1990s, electronic mail became the fastest and easiest way to send information from point to point. By the start of the 21st century, email enabled people around the world to communicate quickly and inexpensively, and the technology quickly became one of the primary tools for global communications.

12
Magnetic resonance imaging

Image: MART PRODUCTION

The impact of the MRI machine on medicine is invaluable. The principles behind nuclear magnetic resonance (NMR) have been known since at least the end of World War II. Yet, two researchers in the late 1960s and early 1970s recognized the potential of this technology to revolutionize medicine forever.

American chemist Paul Lauterbur and physician Raymond Damadian separately experimented with NMR in scanning for cancer cells. After publishing the promising results of their experiments, a patent was filed. By 1977, the first full-body scanner was developed. Since then, millions of lives have been saved by the MRI machine. For his contributions, Lauterbur was awarded the Nobel Prize in Physiology or Medicine in 2003.

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