Photo of Stonehenge
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Stonehenge Up Close

Explore ancient history from your living room!

By Jeanette Ferrara
From the February 2023 Issue

Learning Objective: Students will compare the sizes of the stones at Stonehenge with those of common objects.

Lexile: 930L; 770L
vertically

Standing straight up and down, perpendicular to the ground

comparison

A strategy to identify the measurement of an object in relation to the measurement of another object

high-resolution

Extremely clear, so that the viewer can see fine details

iconic

Very famous or popular

augmented reality

A type of technology that combines the real and virtual world. Through the use of phone apps or other gaming equipment, augmented reality technology places a digital image on top of your view of the real world and may also add sounds or other sensory information to what you would normally hear or feel.

prehistoric

Belonging to a time before history was recorded in written form

More than 4,000 years ago in what is now England, prehistoric people began an astonishing construction project. The builders had no metal tools, horses, or wheels. But somehow, for some unknown reason, they gathered massive 20-ton stones and arranged them vertically in a circle. Then they managed to drag the 2-ton stone blocks across 175 miles and added them to the monument. Today, we call this strange and awe-inspiring stone circle Stonehenge.

Recently, photographer Martin Edström partnered with National Geographic to capture Stonehenge in augmented reality, or AR. That way, people around the world can use an app on their phone to see it up close in 3-D, like a digital tour.

More than 4,000 years ago, prehistoric people started to build something amazing. They lived in an area that is part of England today. The builders did not have metal tools. They also didn’t have horses or wheels. But somehow, they gathered huge stones. Each stone weighed 20 tons! The builders arranged the stones vertically in a circle. Then they dragged more stone blocks across 175 miles. These blocks weighed 2 tons each. The builders added them to the circle. No one knows why they did it! Today, we call this stone circle Stonehenge.

Martin Edström is a photographer. He recently worked with National Geographic to capture Stonehenge in augmented reality, or AR. Now people around the world can use an app on their phone to see the site up close in 3-D. It’s like a digital tour!

Stone Structure

“Stonehenge is one of those iconic places that almost everyone has heard of,” Edström says. “When I got asked to capture it in 3-D, I couldn’t have been more excited.”

The site includes three main features. The oldest is a large circular ditch and a series of pits called Aubrey holes. The holes may have once held wooden posts or stones.

“Stonehenge is one of those iconic places that almost everyone has heard of,” Edström says. “When I got asked to capture it in 3-D, I couldn’t have been more excited.”

Stonehenge has three main features. The oldest is a large circular ditch and several pits called Aubrey holes. The holes may have once held wooden posts or stones.

Jim McMahon/Mapman®

Next were the sarsen stones. Each of these giants weigh as much as four African elephants! Builders arranged the stones in circles and arches that line up with the summer and winter solstices. That means they frame the sun as it rises on the first day of summer and as it sets on the first day of winter each year.

Builders added bluestones last. These smaller stones weigh 2 to 4 tons each. They were arranged in an oval inside the sarsens. People rearranged the bluestones from time to time during the centuries Stonehenge was used.

Why did these ancient Stone Age people go to such lengths? They left no written language, art, or explanation behind. The purpose of Stonehenge is one of the site’s great mysteries.

Next are the sarsen stones. Each of these giant stones weighs as much as four African elephants! The ancient builders arranged the stones in circles and arches. These shapes line up with the summer and winter solstices. That means they frame the sun as it rises on the first day of summer and as it sets on the first day of winter each year.

The builders added bluestones last. These smaller stones weigh 2 to 4 tons each. They are arranged in an oval inside the sarsens. The prehistoric people sometimes moved the bluestones around during the centuries Stonehenge was used.

Why did these ancient people work so hard to build Stonehenge? They left no written language or art behind. The purpose of Stonehenge is one of the site’s great mysteries.

Capturing Stonehenge

Martin Edstrom

Martin Edström helped capture Stonehenge in augmented reality.

The AR software Edström and his team used requires images of an object to create a 3-D model. So the team took pictures around, under, above, and sometimes beneath each stone. That added up to more than 7,000 high-resolution images of Stonehenge! “We made sure we didn’t miss any angles or nooks of the boulders and stones,” says Edström.

Timing was another challenge. Stonehenge is one of England’s most popular tourist sites. It’s open to visitors year-round. Edström and his team could take pictures only early in the morning before the site opened to the public.

Edström and his team used a type of software program to capture Stonehenge in AR. The software uses many images of an object to create a 3-D model. So the team took pictures from every side of each stone. They took more than 7,000 high-resolution images of Stonehenge! “We made sure we didn’t miss any angles or nooks of the boulders and stones,” says Edström.

Timing was another challenge. Stonehenge is one of England’s most popular tourist sites. It’s open to visitors year-round. Edström and his team had to take pictures early in the morning before the site opened to the public.

Shutterstock.com

Builders constructed Stonehenge from different types of stones, arranging them in precise ways.

 

1. bluestone circle
2. sarsen circle

Bringing History to All

Shutterstock.com (Stonehenge, Phone); Martin Edstrom/National Geographic (Edstrom's Images)

Edström’s images let people experience Stonehenge from anywhere.

Working at one of the most well-known prehistoric sites in human history left an impact on Edström. “The most interesting thing is probably the size and scale of the boulders as you walk among them,” Edström says. “It must have been an absolutely mind-boggling process to transport them there and to raise them several thousand years ago.”

National Geographic has brought its 3-D model to millions of people, who can now explore Stonehenge in their living rooms by using AR.

So far, the project has received great feedback. “I’ve been so happy to see the response online to this ancient site,” says Edström. “In one way, it’s just a bunch of boulders. But this story shows that it’s so much more.”

Working at one of the most well-known prehistoric sites in human history left an impact on Edström. “The most interesting thing is probably the size and scale of the boulders as you walk among them,” Edström says. “It must have been an absolutely mind-boggling process to transport them there and to raise them several thousand years ago.”

National Geographic has brought its 3-D model to millions of people. Everyone can now use AR to explore Stonehenge in their living rooms.

The project has received great feedback. “I’ve been so happy to see the response online to this ancient site,” says Edström. “In one way, it’s just a bunch of boulders. But this story shows that it’s so much more.”

Now You Try It

Use the information in the chart below to compare sizes of Stonehenge features with familiar objects.

Use the information in the chart below to compare sizes of Stonehenge features with familiar objects.

Shutterstock.com

One bluestone weighs about twice as much as a car. Write and solve an equation for the weight of the bluestone. 

One bluestone weighs about twice as much as a car. Write and solve an equation for the weight of the bluestone. 

Each sarsen stone is about as tall as 5 average fifth-graders. How tall is an average fifth-grader? Write an equation and solve.

Each sarsen stone is about as tall as 5 average fifth-graders. How tall is an average fifth-grader? Write an equation and solve.

The Aubrey holes form a large circle with a diameter (distance from side to side) the length of 4 competition swimming pools. What is the diameter of the Aubrey hole circle? Write an equation and solve.

The Aubrey holes form a large circle with a diameter (distance from side to side) the length of 4 competition swimming pools. What is the diameter of the Aubrey hole circle? Write an equation and solve.

Around 2150 B.C., 82 bluestones were transported from Wales to Stonehenge. The distance is about the length of 3,000 football fields. How many feet were the bluestones moved? Write an equation and solve.

Around 2150 B.C., 82 bluestones were transported from Wales to Stonehenge. The distance is about the length of 3,000 football fields. How many feet were the bluestones moved? Write an equation and solve.

Activities (6)
Answer Key (1)
Activities (6)
Answer Key (1)
Step-by-Step Lesson Plan

1.  SPARK ENGAGEMENT.

Before or after reading the article, spark a discussion based on the following questions.

  • Describe a historic place you have visited or one that you would like to visit one day. 
  • Do you think it’s important to preserve historic sites? Why or why not? 
  • Name something that you think might be close in height to this school building.

2. INTRODUCE THE MATH CONCEPT AND VOCABULARY

  • Hold up two objects, one of which is about half the size of the other. For example, a pencil and a ruler. Which of these two objects is longer? (the ruler) If I had more than one pencil, about how many do you think I could line up along the side of this ruler? (2
  • Let’s say that this pencil is 14 cm long. Without measuring it, how could we estimate how long the ruler is? (We could multiply the length of the pencil by 2
  • Write or display the equation 14 cm × 2 cm = x. When comparing the sizes of two objects, it can help to write an equation. In this equation, we are using the variable x to represent the unknown value, the length of the ruler. 
  • What is the solution to this equation? (14 cm × 2 cm = 28 cm
  • Today we will compare the sizes of common objects with the sizes of the stones at Stonehenge using equations  with variables.

3. WORK THROUGH THE “WHAT TO DO” BOX.

  • Why was the weight of the sarsen stone compared with the weight of an African elephant? (Answers may vary. Possible answer: Both the African elephant and the sarsen stone are very heavy.
  • What letter was used as a variable in the equation? (the letter p) What did the variable represent? (the number of African elephants that equal the weight of the sarsen stone
  • What operation was used in the equation? Why? (Division was used because the sarsen stone weighs more than an African elephant.)

4. REINFORCE WITH MATH PRACTICE.

Have students complete problems 1 through 4. 

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