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Developing countries have been invaded by 200-pound Nile perch, pretty flowers and beavers. A new study asks: What's the impact?

Video footage and the locations of key Iranian military facilities lend credence to the idea that the jetliner carrying 176 people was accidentally shot down.

Leon Sanchez Reyes is one of an untold number of students who straddle the U.S.-Mexico border — caught between two worlds amid stepped-up immigration enforcement under President Donald Trump and, before him, President Barack Obama.

After two days of congressional testimony, what seemed clear was how little Congress seems to know about Facebook, much less what to do about it.

California has a legal limit for alcohol intoxication, but it does not have one for marijuana. Researchers at UC San Diego are working on trying to determine how much pot leads to impairment.

The invasive species have been caught mere miles from Lake Michigan. Scientists fear if they invade the lake, they could spread throughout the Great Lakes.

The Environmental Protection Agency wants to withdraw approval of a controversial herbicide made by Dow AgroSciences. The firm made conflicting claims to EPA and the Patent Office about the product.

U.S. Customs and Border Protection announced Tuesday the eight sample walls are now under construction in San Diego. Still, it remains unclear where the funds for the actual one will come from.

"I know for sure that if it was still Robert Mugabe, I would never dare to do it," says Savanna Madamombe. "The Mugabe era is gone, and it's something that can't ever be allowed to come back."

A judge who was berated by Donald Trump during the presidential campaign said Friday he was inclined to conclude he can decide a lawsuit that challenges the president's proposed border wall with Mexico but gave no indication how he'll rule.