Arsenal boss Arsene Wenger is not "fearful" of losing Alexis Sanchez in January despite his two goals helping the Gunners win at Crystal Palace.

It says it will slash the price of battery replacements and issue new monitoring software.

The investment comes as the ride-hailing company concludes a difficult year.

The best readers' photographs sent in response to themes over the course of this year.

How two Louisiana brothers went from a shack to America's top universities.

A selection of the best photos from across and about Africa this year.

Chris Barker hasn't let a diagnosis of Crohn's disease stop him from becoming a personal trainer.

Zulekha Daud started practising medicine in the UAE when it had no proper hospitals or doctors.

The story of Rahmah and her experiences as a Chinese woman in a hijab.

Lola Ogunyemi says the ad, which appeared to show her turning into a white woman, was taken out of context.

Immunotherapy is a breakthrough technology that scientists hope will one day lead to cures for previously untreatable cancers.

There's a polarising group of entrepreneurs jumping into Canada's pot market: cops and politicians.

Despite being banned, humiliating and traumatic, virginity tests remain widespread in Afghanistan.

What will 2018 look like for fans, bands and artists?

The year saw optimism among US investors, despite the turmoil of President Trump's first year in office.

Palanichamy Sarathkumar is a hero after lifting a calf out of a ditch and reuniting it with its mother.

More investigation is needed into the death of Australian Justine Damond, a prosecutor says.

The fire at a rooftop restaurant at the popular Kamala Mills compound has killed 15 people.

A baby was among the dead in an apartment blaze described by the mayor as an "unspeakable tragedy".

Dolphins in southern Brazil have a special relationship with the local fishermen.

The family of eight, including small children, are refusing to go home but can't travel elsewhere.