Dirty secrets: sediment DNA reveals a 300,000-year timeline of ancient and modern humans living in Siberia

By analysing fragments of ancient DNA that survived in cave sediments, scientists are helping illuminate some of the dark corners of our history

Barnaby Joyce’s return, and John Anderson’s loss, is symbolic of a political culture gone awry

Joyce’s return indicates Australian politics is caught in the culture of personal ambition, a certain nastiness, and an obsession with popularity

The Great Barrier Reef is in danger: A call to action on climate change

The growing disconnect between Australian stewardship of the Reef and the government’s support of the fossil fuel industry has to stop

Morrison's dilemma: Australia needs a dual strategy for its trade relationship with China

It is the United States, not China, that has undermined the role of the WTO as the mechanism for settling trade disputes

Mexican president suffers setback in country's deadliest election in decades

People's odds of loneliness could fall by up to half if cities hit 30% green space targets

And the benefits are even stronger for people who live alone