Puerto Rico 'heartbreaking' five weeks post-storm

Conditions in Puerto Rico are still heartbreaking more than five weeks after Hurricane Maria wrought devastation, with the lack of power and clean water compounding chronic conditions, medics say.

Hopes dashed for giant new Antarctic marine sanctuary

Hopes for a vast new marine sanctuary in pristine East Antarctica were dashed Saturday after a key conservation summit failed to reach agreement, with advocates urging "greater vision and ambition".

Facebook moves toward revealing political ad backers

Facebook said Friday it would take steps to deliver on a promise to reveal backers of political advertisements to boost transparency in the wake of criticism of the social network's role in the 2016 US election.