Hope has returned to the small city of Serrana, Brazil, after researchers vaccinated almost its entire adult population in a city-wide medical experiment this spring.

El Salvador will become the first county to adopt bitcoin as a legal tender, Salvadorian President Nayib Bukele announced in a video recording shown during the Bitcoin 2021 conference held in Miami.

Attackers killed 88 people in Nigeria's Kebbi state on Thursday, spurring its governor to pledge a bigger deployment of security forces on Sunday as insecurity spreads largely unchecked through the country's northwest.

Looking to fund big spending projects at home, the United States has an ambitious pitch for countries around the world: It's time to overhaul the global tax system.

Thousands of Hungarians, some of them holding banners declaring "treason," protested on Saturday against a Chinese university's plans to open a campus in Budapest.

At least 132 civilians were killed in the worst militant attack in Burkina Faso in recent years, the government said on Saturday, after armed assailants laid siege overnight to a village in the jihadist-plagued northeast.

One candidate is a former boxer and promises to fight for people as hard as he did it in the ring.

The Nigerian government has ordered federal prosecutors to arrest and prosecute users of the Twitter app, after a ban on the social media company took effect on Friday.

The looting of ancient art in Italy is not a new phenomenon. It is at least as old as the Roman empire, which not only contended with its own tomb raiders -- or "tombaroli," as they are known in Italy -- but also pilfered riches from other nations.

The number of babies born in Japan fell to a record low last year, the health ministry said on Friday, as more couples put off marriage and starting a family amid a global pandemic.