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![Russia has never acknowledged that any nuclear accident took place at the Mayak facility in the Chelyabinsk region in 2017.](https://cdn.mos.cms.futurecdn.net/8oRxbz8eMT8CqBGA9czEJY-320-80.jpg)
Mysterious Radiation Cloud Over Europe Traced to Secret Russian Nuclear Accident
By Tom Metcalfe published
The cloud held up to 100 times the level of radiation released after the Fukushima accident in Japan in 2011.
![A man stands next to one of 65 containers full of imported plastic trash being inspected by the local environment office at the Batu Ampar port in Batam, Indonesia, on June 15, 2019.](https://cdn.mos.cms.futurecdn.net/EVvD9gE4ZFa5uxph7B3ByY-320-80.jpg)
The Plastic We 'Recycle' Is Actually Horrible for the Environment
By Yasemin Saplakoglu published
When you drop your plastic waste into the recycling bin, where does it go?
![The Chernobyl nuclear power plant.](https://cdn.mos.cms.futurecdn.net/vPKqoaumVKiu7aAjA3UmTh-320-80.jpg)
There Are Still 10 Chernobyl-Style Reactors Operating Across Russia. How Do We Know They're Safe?
By Stephanie Pappas published
The flawed reactor design that led to a catastrophic meltdown at the Chernobyl Nuclear Power Plant was used in several other places. Some are still operating.
![Boulder about to fall has potential energy relative to the slope.](https://cdn.mos.cms.futurecdn.net/DWemnoAW58tbQnhsP2tPdC-320-80.jpg)
What Is Potential Energy?
By Mark Davis published
Potential energy is a core concept of any physics-based discussion, and one of the most influential variables in the formulas that describe our known universe.
![A large truck was observed on the access road between the Guard Barracks and Southern Support Area on May 15, 2018, at the Punggye-ri site in North Korea.](https://cdn.mos.cms.futurecdn.net/d3SJyeF4H28T6qmPKLfuaX-320-80.jpg)
Here's the Science Behind Finding North Korea's Nuclear Weapons
By Stephanie Pappas published
Remote monitoring can reveal a lot.
![Biodegradable cup](https://cdn.mos.cms.futurecdn.net/HXiXoMd6ADJ9uNTzUkKRi6-320-80.jpg)
If You Throw a Compostable Cup in the Trash, Does It Still Break Down?
By Ashley P. Taylor published
Compostable products are all the rage these days. But what happens to these items — including compostable straws and silverware — when they're thrown into a landfill instead of a compost heap?
![fusion stock image](https://cdn.mos.cms.futurecdn.net/XJsZqezARSYzTevkX8STpG-320-80.jpg)
Nuclear Fusion Power Could Be Here by 2030, One Company Says
By Tom Metcalfe published
This is a major advance on the way to achieving fusion energy.
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