Environment

Silver carp are among four types of Asian carp threatening to invade the Great Lakes, where scientists say they could compete with native species, unravel aquatic food chains and devastate the region's $7 billion fishing industry.

Citing a population rebound, the Interior Department has announced plans to strip the bear of federal protection. But some groups are skeptical, and they've signaled they're prepared to resist.

Hummingbirds have eggs like Tic Tacs. Some eggs are more like ping pong balls. Now, an international team of scientists believes it has solved the mystery.

The country's changing attitudes toward pets are highlighted by the annual dog meat festival in Yulin City. The government issues a ban on dog meat sale, then promptly reversed it.

The weed is flourishing now in the St. Charles and Lanesboro areas and is highly poisonous to people and livestock, the Minnesota Department of Agriculture says. Here's how to identify it and stay safe.

As renewables make up a bigger share of the nation's energy grid, some worry about blackouts when the wind doesn't blow. But grid operators say they're getting better at balancing energy resources.

Physician, astronaut and engineer Dr. Mae Jemison says everybody needs to be "science literate" to think their way through the day, and be a contributing member of society.

Meteorologists said Tuesday evening the temperature topped out at 119 degrees -- too high for some smaller planes to handle.

What road did your lunch travel before it reached your plate? This video follows a BLT from the fields where it began its journey.

During a flood in Duluth five years ago, two harbor seals, Vivian and Feisty, managed to escape their enclosure at the Lake Superior Zoo -- prompting a frantic search for other escaped animals.

Sunday's attack was believed to have been a rare predatory move, not a defensive action such as when a female bear will protect her cubs.

Deadly heat waves are bigger killers than previously thought and are going to grow more frequent, according to a new study of fatal heat conditions. Still, those stretches may be less lethal in the future, as people become accustomed to them.

A judge says he's inclined to let a group of individual members of American Indian tribes join a lawsuit over the Dakota Access oil pipeline, but only if they agree to not add President Donald Trump as a defendant.

A federal judge has handed a lifeline to efforts to block the Dakota Access pipeline, ruling Wednesday that the U.S. Army Corps of Engineers didn't adequately consider the possible impacts of an oil spill where the pipeline passes under the Missouri River.

Whether the new monument, considered sacred to Native Americans, should be abolished or reduced is the first part of a review of national monuments under an executive order by President Trump.

Thousands of vehicles involved in the automaker's skirting of air pollution rules await repair and resale or recycling at an industrial site in Brainerd.

The restoration of the St. Louis River that flows past Duluth into Lake Superior is nearly complete, but money for the project -- and dozens of other cleanup efforts across the Great Lakes -- has been zeroed out in the president's budget plan.

The lock and dam, along with its visitor center, closed to boat traffic in 2015 over fears of spreading the invasive Asian carp. Last summer, the tours resumed through a partnership between a number of agencies and groups.

Interior Secretary Ryan Zinke announced that the regulations - which have been subject to years of negotiation and controversy in Western states - are once again under review.