Explainers and analysis that put the news in context.
The outbreak, caused by a rare Ebola species with no approved vaccine or treatment, is the fastest-growing on record, and health officials warn a recent dip in cases may be misleading.
Sen. Flávio Bolsonaro finished narrowly ahead of President Luiz Inácio Lula da Silva in Sunday's first round, setting up a three-week race with high stakes…
The world's major industrial democracies agreed Friday to tap emergency stockpiles over four months, starting with diesel, but analysts expect only modest relief at the pump.
The justices open with a Colorado climate lawsuit against two oil companies, with arguments on AR-15 bans, Arizona voting rules and third-country deportations to follow…