How tiny organisms make a big impact on clean water

Nearly every body of water, from a puddle or a pond to a vast ocean, contains microscopic organisms that live attached to rocks, plants, and animals. These so-called sessile suspension feeders are critical to aquatic ecosystems ...

Bighead carp snagged in St. Croix River

It's an ugly brute with a gaping mouth and eyes that hang low on the bottom of its face. Someday soon, with two of its equally odious cousins, it could take over Minnesota's rivers and lakes, squeezing out native species. ...

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