Archaeology
Archaeology is not just about finding gold in ancient tombs. It is often about looking at the things people threw away thousands of years ago to understand exactly how they lived.
What Can Rubbish Tell Us About the Past?
Buried at the very bottom. As Bill Nye the Science Guy explains, people throw things away over time, so the newest rubbish lands on top of the older layers.
Carbon! Specifically, a radioactive type called Carbon-14. Every living thing absorbs carbon, and scientists can measure how much is left to determine its age.
Put Your Instincts to the Test
Think about what you already know about digging up the past. Pick an answer for each question, then see if your instincts were right.
Keep a careful record of exactly where they found it. Knowing exactly where an artefact was buried tells scientists a lot about how it was used in daily life.
Their social organisation and defence strategies. Bill Nye the Science Guy notes that the construction methods and the energy put into building structures tell us what was important to the people who built them.
It must have been alive at some point. Plants, animals, and humans absorb carbon while they are alive. Once they stop living, the Carbon-14 slowly decays over time.
Understanding the Science
Tap each card to reveal the explanation.
Key Concepts
Archaeology
Tap to learn moreArchaeology is the study of ancient people and their cultures by examining the things they left behind. It helps us piece together human history by looking at physical evidence.
Artefact
Tap to learn moreAn artefact is an object made by a human being, typically one of cultural or historical interest. The word comes from Latin words meaning "made with skill". Common examples include tools, pottery, and weapons.
Radiocarbon Dating
Tap to learn moreRadiocarbon Dating is a scientific method used to determine the age of an object containing organic material. Scientists do this by measuring the amount of unstable Carbon-14 left inside it.
Midden
Tap to learn moreA midden is an ancient rubbish heap. These piles of discarded shells, bones, and broken tools give archaeologists a brilliant snapshot of daily life and eating habits in the past.
Rosetta Stone
Tap to learn moreThe Rosetta Stone is a famous stone tablet that helped scientists decode ancient Egyptian hieroglyphics. It featured the exact same message written in three different languages, acting as a translation guide.
Try It: Carbon-14 Half-Life Simulator
Watch Carbon-14 atoms decay into Nitrogen-14 over thousands of years. Each orange dot is a Carbon-14 atom. When it decays, it turns green (Nitrogen-14). Press Start to begin, and watch the half-life in action!
Apply Your Knowledge
Now let us see if you can connect what you have learned to the real world.
Match the Concepts
Click an object to select it, then click the matching description to place it.
Real-World Challenge
Imagine you are an archaeologist 1,000 years in the future excavating a 21st-century school. Based on the artefacts you find, such as plastic pens, computer screens, and metal lunchboxes, what conclusions would you draw about how students learned and lived?
What Has Changed Since This Episode Aired
This episode of Bill Nye the Science Guy first aired in the 1990s. While the core science remains accurate, here are a few things that have been refined or expanded since then.
Updated: Science has refined the timeline of human evolution. While early hominids (our ancient ancestors) were walking around three million years ago, anatomically modern humans (Homo sapiens) actually appeared much more recently, around 300,000 years ago.
Updated: While the core science of radiocarbon dating is exactly the same, modern archaeologists use much more advanced tools like Accelerator Mass Spectrometry (AMS). This allows scientists to date much smaller samples, sometimes just a single seed, without destroying the precious artefact!
Test Your Understanding
Answer these questions and get instant feedback. How many can you get right?
Results
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Reflection
If archaeologists dug up your bedroom in 2,000 years, what is one artefact they would find, and what do you think they would mistakenly assume it was used for?
If you could be an archaeologist for a day, what kind of ancient civilization would you want to uncover?