If you like ice, you have to love the Great Lakes, where it comes in all shapes and sizes. With the recent deep freeze, we're seeing a lot more ice than in the past few winters -- including a frosty Niagara Falls. Here's a look at some unusual shapes and sizes:
The Great Lakes/St. Lawrence River make up the world's biggest freshwater system -- and an enormously valuable resource. It supplies drinking water for millions of residents and powers the region's economy.
As America confronts the opioid crisis, environmental scientists are warning about a related problem. Chemicals from pain-killers and other drugs often end up in lakes and rivers, creating what some scientists say could be a deadly cocktail for fish and other wildlife.