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In a stunning political comeback, Luiz Inácio Lula da Silva has won Brazil's Presidential election, defeating the incumbent, right wing populist President Jair Bolsonaro

The online tool tracks power plants, oil refineries, large ships and other sources of greenhouse gases. Gore plans to expand the tracker to observe every major source of emissions.

The monthlong strike by graduate student teaching assistants and other academic workers disrupted classes at all 10 campuses. The agreement needs to be ratified before the strike officially ends.

Brad Smith says governments need to step in and set rules for the Internet giants. "Almost no technology has gone so entirely unregulated, for so long, as digital technology," he says.

Stock markets received a boost from new data showing inflation is easing. Lower inflation has raised hopes about the U.S. economy — but there are still a lot of unknowns.

Mount Spurr in Alaska is likely to erupt soon. So people are buying goggles and masks to protect themselves from ash — and also pet versions to protect their dogs.

If the tax cut for wealthiest Americans is allowed to expire, those households making over $250,000 would see their income tax rate rise from 33 percent to 36 percent and those making upwards of $375,000 would go from a 35 percent rate to 39.6 percent. But does it make sense for the tax rate for someone making six figures to be the same as for multimillionaires?

Democrats continue to grapple with serious questions about President Biden's future as the party's nominee for president.

National sorority leaders have told members at the University of Virginia not to attend a multi-frat Bid Night party after a discredited article about a gang rape.

The Devils Hole pupfish's natural habitat is a single water-filled hole in a cave in the Nevada desert. Its numbers at one point dwindled to just 35 animals. How does it manage to survive?