Beginner
Scientists in Canada found something strange. A small island moved a very long way.
The island is in a lake called Williston Reservoir. It has trees on it.
People saw the island in July. Then it disappeared. Workers could not find it in satellite pictures.
In September, the island came back! It was very far away. It was more than 18 miles from where people first saw it.
The island is not a normal island. It is made of wood. Old branches and logs came together over many years. Plants grew on top of the wood. This made it look like land.
The company that watches the lake said the island is not safe. People should not walk on it or get close to it.
Vocabulary
- island — a piece of land with water all around it
- lake — a large body of water with land around it
- disappear — to stop being seen
- satellite — a machine in space that takes pictures of Earth
- wood — the hard material that trees are made of
- branch — a part of a tree that grows from the trunk
- float — to stay on top of water
- safe — not dangerous
Comprehension Check
Discussion Prompts
- Have you ever seen something strange in nature? What was it?
- Do you like lakes or rivers near your home?
- What do you think islands are usually made of?
Intermediate
A mysterious island in a British Columbia lake has been surprising scientists for weeks.
The island, covered in trees, first appeared in the Williston Reservoir in July. A power company called B.C. Hydro used satellite images to confirm it was real. But by early August, the island had vanished from the pictures completely.
Then, in September, the island reappeared. This time, it was more than 18 miles from where it was first spotted.
So how does an island move that far? According to B.C. Hydro, it isn’t a normal island at all. Over several years, driftwood built up along the shoreline. Plants and trees slowly took root in the decaying wood, forming a floating landmass. Rising water levels eventually caused it to break free from the shore and drift away.
Officials are warning visitors to stay away from the island. “It isn’t an island so much as a loose collection of logs and decaying woody debris,” the company said. “The surface is unstable and unsafe to land on or climb across.”
Vocabulary
- mysterious — strange and difficult to explain
- confirm — to show that something is true
- vanish — to disappear suddenly
- reappear — to appear again after being gone
- driftwood — wood that floats on water
- take root — (of a plant) to start growing in soil
- landmass — a large area of land
- unstable — likely to move, fall, or break
Comprehension Check
Discussion Prompts
- Why do you think this story became popular in the news?
- Have you ever seen something in nature that surprised you?
- What questions would you ask the scientists about this island?
Advanced
For weeks, a mysterious floating island in British Columbia’s Williston Reservoir has been baffling residents and utility officials alike.
The tree-covered landmass was first confirmed by B.C. Hydro using satellite imagery captured in mid-July, only to vanish from subsequent images by early August. Then, in a development that seemed to defy explanation, the island resurfaced in September, this time more than 18 miles from its original location.
The mystery, however, has a fairly grounded explanation. B.C. Hydro spokesman Bob Gammer explained that the “island” likely formed gradually over several years, as driftwood accumulated along the reservoir’s shoreline. Plants and trees eventually took root in the decomposing wood, creating a landmass that could pass for solid ground at a glance. Rising water levels are believed to have caused the mass to break free and drift across the reservoir.
Despite its convincing appearance, officials are urging the public to keep their distance. “It isn’t an island so much as a loose collection of logs and decaying woody debris,” the company said in a statement. “The surface is unstable and unsafe to land on or climb across.”
Vocabulary
- baffle — to confuse someone completely
- utility (company) — a company that provides a public service like electricity or water
- accumulate — to gradually increase in amount over time
- decompose — to decay or break down naturally
- resurface — to appear again after being hidden or out of sight
- convincing — believable or persuasive
- keep one’s distance — to stay away from something or someone
- grounded (explanation) — reasonable and based on facts, not speculation
Comprehension Check
Discussion Prompts
- What does this story reveal about how natural phenomena can be misunderstood at first glance?
- Can you think of other examples where something in nature looked unusual but had a logical explanation?
- Why might officials prioritize public safety warnings over correcting the “mystery” narrative?
Original story: “Mysterious vanishing island reappears on British Columbia reservoir” by Ben Hooper, UPI (September 2, 2026).