Why there is growing scepticism in Kenya over a plan to vaccinate the national herd.

The app spooked the markets as well as the bullish sense of American superiority in AI development.

The full scale of the humanitarian challenge ahead is emerging as displaced Palestinians return home, writes the BBC's Paul Adams.

A Ukrainian grandmother mourns her daughter, grandson and mother - killed in a single Russian strike.

At least 17 people have reportedly been killed and close to 400 wounded.

Democrats warn the move could have "devastating consequences" on programmes that people across the US rely on.

Milos Vucevic's resignation follows months of nationwide demonstrations over the collapse of a station roof which killed 15.

How did a little-known Chinese start-up build a powerful new AI model despite restrictions?