A building containing a school collapsed in the Nigerian city of Lagos, killing at least 11 people. Why?

See how people react when you tell them how long they're going to live.

Young people around the world spoke to the BBC about how they are directly affected by climate change.

It's the weekly news quiz - have you been paying attention to what's been going on in the world during the past seven days?

A selection of the week's best photos from across the continent and beyond.

People who make friends gaming online say the death of those friends is as hard as real-life loss.

PM Jacinda Ardern condemns the "terrorist attack" in Christchurch, which was live-streamed by a gunman espousing far right, anti-immigrant views.

Lewis Hamilton starts the new Formula 1 season with fastest time in the first practice session at the Australian Grand Prix.

The law aims to ease foreign concerns and is seen as an olive branch to the US amid trade war talks.

A migration from Central Europe transformed the genetic make-up of Iberia, a new DNA study reveals.

A Russian accused of meddling in the US 2016 election plays down his role in a BBC interview.

The game has grabbed headlines in recent months, prompting authorities to even ban it in some cities.

Discussions have taken place in London ahead of a third vote on the PM's Brexit agreement next week.

The new mass-market electric vehicle has a base price of $39,000 and a 230-mile range.

North Korea says the US is "gangster-like", but Mr Trump and Mr Kim have "wonderful" chemistry.

Felicite Tomlinson's sisters pay tribute to the aspiring fashion designer who died last week aged 18.

Lewis Hamilton heads a Mercedes one-two in second practice at the season-opening Australian Grand Prix.

The Bangladesh cricket team were minutes from being inside a mosque during a fatal mass shooting in Christchurch.

At least 45,000 Afghan police and soldiers have died over the past four years.

BBC Sport takes a look at why big-name superstars Odell Beckham Jr, Le'veon Bell and Antonio Brown are moving to new teams in the NFL.

Williams' new Formula 1 star George Russell tells BBC Sport how he first fell in love with racing and reveals the surprising things that go through his mind on the grid.