With a loneliness epidemic gripping many parts of the world, some people are turning to AI chatbots for friendship and relationships. But is it really all just harmless fun?

Earlier this year, a Boeing aircraft's door plug fell out in flight – all because crucial bolts were missing. The incident shows why simple failures often signal larger problems.

Researchers say they understand how fake claims and wild theories surface – and then take hold. But can anything be done about them?

One year ago, the Titan submersible was lost while visiting the wreck of the Titanic. Ocean explorer Victor Vescovo explains why the mishap could make future deep-ocean voyages safer.

Pre-modern states and civilisations became more prone to collapse as time passed – a pattern that holds lessons for today's ageing global powers.

A prominent US engineer once argued we should set alight every coal mine on the planet - why did he believe it would improve the climate?

When picturing humanity's future, dark visions are everywhere - but are there alternatives? Historian Thomas Moynihan explores what we can learn from forecasters 100 years ago.

As we grow up, we are trained to think about things in a linear way. But it can leave us ill-equipped in our complex, fast moving world, harm our finances and even mislead AI.