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This was the hottest July ever recorded on Earth, according to federal climate scientists. It's a stark reminder that humans are rapidly warming up the planet by burning fossil fuels.

Most revolutionary political figures consider compromise a dirty word and a sign of weakness. Yet Mandela consistently preached pragmatism, and many of his defining moments involved acts of flexibility, reconciliation and magnanimity.

The action hero lives in the imaginary nation of Wakanda, the most technologically advanced society in the world. Is there a basis for it in African history?

Once a standard fixture at every gas station, paper maps have all but folded in the digital age. But there are places that can baffle your high-tech gadgets. In Maine, weekend explorers might want to take along a map in addition to their GPS unit.

Toads have made their way to just about every corner of the world, even potentially Antarctica, something deemed unthinkable in the past. What's behind this vast toad migration?v

Images of a young man reciting poetry at a protest in Sudan and an immersive 360 project from Hong Kong were among the winners of World Press Photo awards.

Dr. Ifeanyi Nsofor of Nigeria writes: "I was elated when the first COVID-19 vaccine was shown to be effective. ... My joy was cut short when richer Western nations began buying up the vaccine doses."

It's expected to be the longest leg of the Solar Impulse's planned around-the-world flight, a trip that will last five days and five nights.

For the past couple of years, NASA has been using remotely piloted aircraft to study hurricanes. And they are turning up new information about things like how dust from Africa can determine whether weather systems become hurricanes in the Atlantic.

It's not just energy supplies that have been disrupted by the Iran war. It's also hitting frankincense, a commodity that's been defining trade routes in the Middle East for thousands of years.